You also have to factor in that if Kanter came back on the QO he has a no trade clause that could have also hindered the Jazz making any trade with him in it. Not that I think that Happens because he wanted out. But the teams willing to take him on next year on the QO knowing that he is a UFA that next summer would have been slim. I don't think we had a chance of getting much more than we got back in this trade if we took any other route personally. Yes we didn't get what he was worth but.... I don't think we would have no matter what route we took.
This might come off as nitpicky, but this oft-repeated phrase is baffling to me. What is a player worth?? He's worth what's being offered for him. Seeing that (a) we traded Kanter within our division (something that is sometimes avoided for competition reasons -- the
sending team will accept a lesser offer to send the player further from their competitive niche), that (b) Lindsey appears to be a smart man, and that (c) we weren't accepting a deal that financially hamstrung future movements, then we can assume that this trade is the high-water mark of Kanter's current value.
I think it is reasonable to assume that Kanter could not bring back a productive player that the jazz FO liked, and whose contract was a fit with the FO's portfolio of contracts. That was never part of the discussion; Kanter doesn't (currently) have that value.
I think it is also very reasonable to claim that his value would have dropped going forward. If he accepts the QO, and given the previous point, then he becomes a 1-season or half-season rental (which is a late-first round pick, max). We also have enough flexibility with Booker and Millsap's contract (and any others like it we add before the end of this season), that I don't think we've lost some key ingredient for this upcoming period of asset acquisition.
Then, you also have to account for how keeping Kanter could have reduced the value of the other players (or prevented their increasing in value). It isn't hard to imagine an uncommitted Kanter going out there, breaking the offensive and defensive flows, putting up empty stats, and blocking the finer development of Q's schemes.
Anywhoo, we got what Kanter was worth. Fans have very little idea what the true value of players are in advance of a trade, because they are kept out of the war/negotiation rooms. There are some fans who have better, educated hypotheses, but they absolutely lack
critical information.