And honestly, I don't understand the complaining about owners not spending money when the team is already so deep in the tax when we are talking about the 15th/14th man.
It's more about the approach to the season itself. Brad should be evaluated differently if his marching orders were "build the best team you can with a $175 million budget", opposed to "build the best team you can with no spending limits".
It's not necessarily about who the 14th or 15th man is, although it will always be a fair question to ask if ownership did everything in its power to succeed. We passed on using two sizeable TPEs, and used a portion of another. Were there players Brad would have pursued if he had more money to work with, or not?
Let's ignore the summer TPE for now, because that's long past (my feeling is they were negotiating with Atlanta on Huerter and either switched to Brogdon when Atlanta went with SAC, or went to Brogdon once Indiana came down in its demands causing ATL to go with SAC -- those two deals were announced within hours of each other, and Boston had been sometimes linked to Huerter. Notably those negotiations occurred after Alec Burks was traded). Instead, here are the players that were traded at the deadline who fit the Schroder TPE and made more than Muscala:
Cam Reddish -- sent to POR as part of the Josh Hart trade
Cam Johnson -- to Brooklyn in Durant deal
Nickeil Alexander-Walker -- to MIN in Conley-Russell-Westbrook deal
Matisse Thybulle -- to POR for essentially two 2nds
Jarred Vanderbilt -- to Lakers in Conley-Russell-Westbrook deal
Darius Bazley -- to PHO as part of salary offset in Saric salary dump
George Hill -- to IND with a pick as part of MIL creating matching salary for Crowder
Reddish we shouldn't have wanted.
Johnson would have been wonderful, but the cost would likely have been high from Brooklyn post-trade.
NAW was probably obtainable for a 2nd.
Thybulle we could have met the price for -- he'd have required better seconds than we traded for Muscala, but we can reasonably assume he was obtainable if we'd tried.
It's unclear how available Vanderbilt was to us, because Ainge was laser-focused on getting that 1st from LA.
Bazley was obviously available, we'll say for the less valuable of the seconds we traded to OKC.
Hill we could have acquired with a second.
With that list, do you really think it was dollars, as opposed to draft compensation or basketball reasons, that we missed out on any of these? Would you have rather had Thybulle for both of our seconds this year? Is it an obvious enough call that you think the only reason the Celtics nixed it is because that would've cost $3 million more in luxury tax dollars? There are some other guys who weren't traded who we might have liked, but we don't know how much they cost. PJ Washington almost certainly cost a 1st, as the Hornets got a very early 2nd for McDaniels, and unlike McDaniels, Washington is an RFA next year rather than a UFA.
Looking at the list of players who also fit the Juancho exception, we have:
Khem Birch -- dumped as part of Poeltl trade.
Justin Holiday -- dumped to Houston to avoid tax
Rui Hachimura -- traded to Lakers for 3 2nd round picks.
I suppose you could make a case that Hachimura would be better to have than Muscala, but at the cost of an extra pick it's at best debatable. Alternatively we could have had either Birch or Holiday for "free". Is not getting either due to penny-pinching, or simply not burning $30 million on a slightly better 13th or 14th man?
I just don't see a move out there that we know the Celtics could have made that was inherently better than the one they did, and so I'm not convinced Brad had his hands tied by dollars. I do think he had his hands a little tied by a decreasing amount of draft capital, but he did a good job getting NBA value for those picks in trades. There's decreasing returns at the highest level of payroll, as the Clippers and Warriors have shown us this season -- you can only have so many players in the regular rotation.