I think the fact Petrie said they're going to be aggressive this off-season speaks volumes, as do the repeated comments by the Maloofs indicating they've pretty much learned their lesson and are going to let Petrie do his job.
Petrie won't be going for quick fixes. I suspect he's going to be limited only by the salary cap AND the contracts of a couple of players - like Miller and Thomas - that could hamper some deals.
Well, he can be aggressive and still go for the quick fix. There could be three or four new faces on this team next year, maybe more, so that would be aggressive. But are they going to fit in the vet mold - e.g. Kenny Thomas, Corliss, SAR, Salmons, etc., or are they going for the youth? Correct me if I'm wrong, but I haven't seen one teency weenie little dwarf of a word from Petrie on what vision he has for this team, and whether he wants to go young or not. I agree with you, though, on the fact that some players, like Miller, and probably Thomas, are set in stone. But are these two guys going to be surrounded by youngins, or more milk-toast vets?
Petrie said he thought last year's team was good enough to get to the playoffs. That was even with Bibby and Miller having terrible years. (I think that's WACKY). My read is that he thinks the problem then is (1) chemistry (i.e. Artest, SAR/Thomas, lack of rebounding), and (2) coaching. So, my best guess is that he thinks trading Artest, re-arranging the chairs with some other vets who complement one another, getting a new coach, is the ticket, literally and figuratively. Like I said - I hope I'm wrong.