A good move?
No question, the Nesterovic for Bargnani switch makes sense, and may even work.
Here's the reason, as least as far as we can discern after a quick scrum with Sam before their flight today:
The offence, particularly in the first quarter, was bogging down. There was no movement, the signature high screen-and-roll was too cluttered with Bargnani and Bosh and the court and this should get them back to where they were last year.
And Bargnani is going to benefit because I bet he's the first sub off the bench, replacing Bosh, and he can come in firing, much like he did last year.
Defensively, it helps, too. Nesterovic was playing out of his mind in the pre-season, defending his own man on the block and helping to direct traffic in the paint like a veteran should. Bosh can now guard power forwards and let Rasho do his stuff under the basket.
The second unit gets better because Bargnani is a far more potent offensive force than any of the bigs -- Rasho, Humphries, Garbajosa -- who had been coming off the bench.
I can see Nesterovic playing six or seven minutes in each of the first and third quarters and ceding the rest of the time to Bargnani and Bosh, which is just a redistribution of what they'd done in the first five games of the year.
Guess you have to give Sam and his staff credit; they saw something wasn't working and are doing something to change it.