But you say that as if trading him would net a player without their own significant shortcomings, who is a significant upgrade, and doesn't disturb the benefits that a player like Bargnani brings to the table (3PT, Decent Post D -- which has only gotten better).
It obviously takes the majority of big men longer to develop, and Bargnani is still young and hasn't ever had the opportunity to get more touches. Bosh barely ever passes (a major weakness), is a black hole on offense, could never establish a solid pick and roll offense with Bargnani or Turk (both very good passers), and is also a terrible help defender. If you were to play Amir and Bargnani, I think you'll be surprised at the increases in production from both. I don't particularly care if Bargnani only grabs 7-9 rebs a game, especially if Johnson grabs 6-11, and Davis grabs 6-9 (depending on minutes, if either ends up playing as a Raptor next season).
How many teams have two guys grabbing 10+ rebs per game?
There are only so many rebounds to grab in the first place! We had a major rebounding weakness at the starting SG and SF positions last season, and generally underwhelming rebounding from our PG position (with a few exceptions from Jack).