First of I'd like to say, this is a well thought out post. I don't think we need major upheval though. I think we have to give the core guys time to learn from the mistake of missing the playoffs. It will sting to know that they could've decided the own fate and left it on the table. That will hopefully translate into guys hitting the gym to develop their shooting, working on defensive rotations or footwork. Guys here are good players. I agree with you that Balkman is outstanding. He's got some Gerald Wallace type game (Hard rebounder, defends well, goes to the basket).
Curry literally has the weight of the world on his shoulders. He has to try to fill in for a hall of famer in the Mecca of Basketball. Not an enviable task. You can see that Curry is pressing. He feels responsible to prove that Isiah didn't make a mistake by bringing him in. That's hard for anyone, even harder when your 24. The pressure is getting to him. The off season will tell what Curry is made of. He has to go develop his rebounding, timing and footwork. If he does those things, he'll be well on his way to becoming one of the best centers in the Association.
Jeffries should be a bench player or moved. With the emergence of Balkman, Jeffries is only stealing minutes. Frye doesn't have the "ferocity" to be a starter. The same thing could've been said about a reformed "soft forward" in Toronto named Chris Bosh. I think the similarities are there. Frye just has to want it. This is where management needs to sit him down outline a plan with him. If he feels like he can't deliver, he should be moved. That's my 2 cents. I hope guys challenge themselves to get better.