I think a lot of the problems with the offense early in the season found solutions, and before the arrival of Bargnani. I like what he's done with the offense - a ton. He looks for good execution more than he looks to one guy trying doing too much. He looks for players to fill their roles properly. And mostly he looks to not have their defense pay for bad shots missed.
Now they have a bunch of 10-days and guys on the end of the bench, so it's not always pretty. But they still look pretty competitive. Balance out this roster just a bit and I'd think the difference would be very big. And the prognosis would point towards long-term success - something we've never had a sniff at here, largely due to Casey's points of emphasis not being the sorts of things that took root.