I'm not sold Mickey's an NBA player and Rozier has the tallest task of the 3 at running PG before (any of them) are ready for this level. RJ would benefit from spot minutes though, and it'd be informative to see what he does with them. His IQ is high enough, taken together with his length and shooting potential, to make spot minutes worthwhile and arguably helpful. Just my 2 pennies.
Rozier is a scorer, and is the only one of those three guys who really capable of creating his own offense. He also received (by far) the most praise from current guys on the Celtics roster. This suggests to me that he is the guy most capable of earning minutes.
Mickey is a rim protector who can defend multiple positions, and a rebounder. Two things we have (so far) been desperately lacking. He's currently held up by our obviously overcrowded front-court, but if a trade were to happen that thins that out I can see him being the second guy earning minutes.
Hunter...I like what I see from him, but I just don't think he's ready for NBA minutes. I think he can contribute right away on defense, but I don't think he's yet at the level of being NBA ready offensively. He struggled offensively in both the Summer League and in Preseason - and while he ultimately did put up decent scoring numbers, his percentages were terrible.
Rozier and Mickey were the most effective of the three in the preseason, which involves legit NBA caliber competition. That tells me that they are the two guys who are the most NBA-ready.
Hunter has the benefit of playing the position we are weakest at (SG/SF), but I'm not convinced he offers enough to justify playing him over guys like Crowder, Turner and Jerebko. At least not yet.
I agree with ya in general.
-Rozier has the highest ceiling
-Mickey has NBA shot-blocking/altering talent
-Hunter would likely struggle offensively, even in spot minutes
My global take is that Rozier is fighting the biggest uphill battle if for no other reason than it's [dang] hard for a rookie to step into the PG role on a playoff team with a lot of pieces. He's very green, though -- handles are sometimes loose, decision-making is not going to be there for quite some time (naturally), and just like Smart, it'll be a while before he figures out how he can be successful on the offensive end at this level. All to be expected. But I have high hopes for him -- expect nothing less than AB-type development, and that's a major compliment. I have more respect for that kid than any one on this roster -- he turned himself into a fine NBA despite his lack of size and a lack of natural offensive attributes & talents.
Mickey is tough for me to latch onto just yet because he showed signs of being TO-prone in college, and more than anything, he's really undersized for his position. He, like all 3 imo, have the mentality to succeed at the highest level, I'm just concerned b/c he did struggle in college to keep up with smaller guys laterally, and at this level, he'd really struggle in the post with his current size. Not sure how he'll cater his offensive game to the NBA, but he does have some talent there... just imagine it'll be a steep learning curve.
I argued a while ago that Hunter would benefit more from spot mins with the team than D-league reps because I do feel strongly that there's a subset of guys who significantly elevate their game when playing with superior players. His IQ for his age/experience is noticeably very high, and to speak to your point about Rozier's flattery from teammates, I noticed several vets checking in on the court with Hunter during preseason games... which also suggests to me they see an IQ beyond his years and believe he's capable of making contributions. He has clearly struggled offensively early on and I've interpreted that as he not really being sure where he fits best at this level... seeing more off-the-dribble pull-ups from him now than in college, and believe he's just going to have to find his niche... how he can benefit his team most effectively on that end.
Even spot minutes are wishful thinking, I admit, and don't doubt for a second CBS knows what he's doing. I'd just enjoy to see him get some minutes here and there (and due to our offensive woes at SG and SF, as you pointed out... along with his IQ and seeming confidence) and believe it'd be interesting and possibly helpful for him to start getting reps sooner than later. We talk a lot about chronological age here, but there's something (more, imo) to be said for developmental age too.