I wouldn't count on Brooklyn sucking. They finished the season strong. Brook Lopez and Thad Young made a difference. I think our pick from them will end up in the 12-17 range.
So...
Boston made a ton of trades around the All-Star break, and then went on to finish the season as the second hottest team in the Eastern conference. That was a total fluke, so that success will not carry over to next season.
Brooklyn made a trade around the All-Star break, and then went on to finish the season strong. That was because the trade made the team better, and so as a result that success full carry over to next season.
Got it, sound logic.
From a talent standpoint, Brooklyn's late season success made a lot more sense than Boston's. Brooklyn played well down the stretch because of allstar talent. Boston played well down the stretch because of effort and execution driven by a wonder-coach. Which is more sustainable? I don't think either will be bottom 5 next year. But if forced to guess which of the two is most likely to bottom out, it has to be the shakey Boston lineup. Both picks probably end up 12-17. Injuries can derail Brooklyn, but if they are healthy they should be a playoff team. A lot has to go right for Boston to sneak into the playoffs again in spite of their blatant lack of talent, imo.
On paper, Brooklyn looks solidly mediocre. Lopez is 20/10 impact player. Johnson is a borderline all star. There's talent there. On paper, Boston sucks. Stevens proved last year he could MacGyver a .500 team out of paperclips and superglue, but it's hard to sustain quirk success. I'll admit I'm a bit enthusiastic about the David Lee addition (though we already had a handful of borderline starter power forwards) , but how excited can you really get about a team when the best player is coming off a playoffs appearance where he averaged 8 minutes off the bench and had 8 coach decision DNP's? Stevens has his work cut out for him and he struggled early last season finding success while balancing an overloaded roster filled with redundancies.
With all due respect, there is absolutely no sense in any of the points / arguments you're trying to make here.
What All-Star talent did Brooklyn have at the end of the season, that they didn't have in the first half of the season?
The only guy on the Brooklyn roster who is even CLOSE to being an All-Star talent is Brook Lopez, and for the first time in recent memory he actually played starters minutes (72 games @ 30 MPG). You certainly can't try to argue that Thaddeus Young (14 and 5 last season) is an All-Star talent, because that would just be plain trolling.
Also how on earth is Lopez a 20/10 player? He's he's not averaged 20/10 once in his entire career. The closest he ever came was in 2009/10 when he averaged 18.8 points and 8.6 rebounds. That 8.6 rebounds was also (for the record) a career high for him, and still is. Which is downright embarrassing for a guy with his physical profile (7'1" / 260 pound / 7'5" wingspan) who's entire game is based in the paint. Once you factor in his size and his style of play, he must seriously be one of the worst rebounding bigs ever to play the game.
Also, if you're going to label Lopez (with his 17 / 7 in 29 minutes) as All-Star talent, then you can't really get away from awarding Isaiah Thomas (with his 19 / 5 in 29 minutes) with the same label. If you don't then I would love to hear your reason why, since neither player actually made the All-Star team and both put up similar numbers over the course of the season.
Likewise your claim that Joe Johnson is a borderline All-Star is might have been a respectable claim back in 2013/14, but trying to make that argument for last season is quite honestly laughable. He's 34 years old and his his Per-36 stats from last year (14.9 points, 5 rebounds, and 4.2 assists) were the worst of his career. He's clearly on the decline and a shadow of his former self, and if those are 'border All-Star' numbers, then you must love our Celtics, because that would mean that Tyler Zeller (17 / 10 / 2.4), Jared Sullinger (17 / 10 / 2.5), Avery Bradley (16 / 3.5 / 2), Kelly Olynyk (16.5 / 7.7 / 2.8 ), Jonas Jerebko (14.1 / 9.6 / 2.0), David Lee (15.5 / 10 / 3.4) and Evan Turner (12.4 / 6.6 / 7.2) are all borderline All-Stars too.
It's simple - Boston turned their record around because they traded out their two greatest on-court liabilities and re-allocated those minutes to guys who had far, far more positive impact.
Advanced stats show that Rondo was one of the NBA's biggest liabilities at his position, with a Real Plus Minus of -3.21 (ranking him 69th out of 84 NBA Point Guards). When Boston traded him out, they gave those minutes to Marcus Smart (+2.22, 12th among PG) and Isaiah Thomas (+1.45, 21st among PG). That is a improvement of +5.43 when Smart is on the court, and +4.66 when Thomas is on the court. Both are HUGE turnarounds, and that type of improvement at the Point Guard spot along is enough to generate a huge improvement as a team.
But if you look at stats shot that Jeff Green you'll see that there was a similar story at the SF spot too. Green was statistically a major liability for us, with a a RPM of -3.56 ranking him right towards the bottom of NBA Small Forwards (68th out of 80). When he was traded out his minutes went to a combination of Evan Turner (-1.37, 45th among Shooting Guards), Jae Crowder (-0.44, 29th among Small Forwards) and Jonas Jerebko (+2.6, 14th among Power Forwards). This was basically a simple case of addition by subtraction, because even though not all of out players actually had a positive RPM, every one of them was a substantial improvemnt over Green regardless of whether it was Turner (+2.19), Crowder (+3.12) or Jerebko (+6.16) - the improvement at the SF was drastic.
Now if you look at our other starters, we had no real liabilities at the other positions. We were going just fine at SG (Bradley: -0.34), at PF (Sully: +1.66) and at C (Zeller: +0.58 / Olynyk: +3.50).
Now lets do a very rough calculation of the change between old and new scenario.
Old Roster:Zeller: +0.58
Sully: +1.66
Green: -3.56
Bradley: -0.34
Rondo: -3.21
Net RPM: -4.87
Old Roster:Zeller:+0.58
Sully: +1.66
Turner: -1.37
Bradley: -0.34
Smart: +2.22
Net RPM: +2.75
Not obviously this isn't the perfect scientific method for calculating this, but at a quick glance I think this easily demonstrates how the mid seasons trades made by DA could very easily have transformed this team from a really, really bad team to an actually pretty darn good one.
You may like or loathe RPM, but regardless of how you feel I think it's easy for any fan who actually watched the games to see from the eye test that the above makes a lot of sense. Even when Rondo was on the team, we always seemed to play much better when he came off the court, and Smart came one - we tended to close gaps, build leads, etc. Likewise I think we all felt like we played much better as a team when we had Turner, Jerebko or Crowder on the court as opposed to when Green was out there.
Now lets look at the Brooklyn trade.
Brooklyn traded Kevin Garnett to the Timberwolves in exchange for Theddeus Young, right? Well Kevin Garnett had an RPM last year of +0.90 (25th among PF) while Theddeus Young had an RPM of +1.20 (18th among Small Forwards).
So Brooklyn have essentially traded one plus contributor for another slightly more plus' contributor. This trade improves Brooklyn as a team, but only by +0.3 which is barely (if at all) significant.
Ultimately, that was really the only significant trade that Brooklyn made last year, so that move alone is nowhere near enough (according to stats) to account for Brooklyn's late season surge.
Now even if you completely ignore the statistics, it's pretty blatantly obvious that Boston made far more in the way or roster changes (trading away two starters) than Brooklyn trading away one starter) did, so no matter how you look at it I cannot understand how you can possible try to argue that Brooklyn's late season surge is a result of roster changes, while Boston's was just a result of "last minute increase in hustle".
It just makes no sense whatsoever.
Boston clearly made more drastic changes to their roster mid-season than Brooklyn did, so the "roster changes" argument is far more justifiable for Boston than it is for Brooklyn. It is far more believable that Boston could have made a huge turnaround as a team after all those roster changes, then it is that Brooklyn could have made such a big turnaroud after one small roster change. Especially if you're only real argument for Brooklyn is based on the the supposed new-found bond between Lopez and Young - yeah, that's very sustainable!
No matter how you look at it, Boston had a better season AND that did more to improve this season. There is absolutely not a single rational justification as to why anyone would believe that Brooklyn would finish with a better record then Boston this year. Even if injuries come in to play, Boston has so much depth that their impact would be minimal - while one or two injuries could absolutely cripple the nets.