If only it were as simple as you make it sound, I'd agree with you. But I'm not that naive.
Pop is going to be playing mad scientist with the big rotation, similar to how he did with the entire rotation particularly in the first 50 or so games of last season, there's going to be a lack of clarity, McDyess will probably be resting/sitting out too much, Bonner will inevitably be playing too much because the Spurs are obsessed with having a stretch four (I knew they couldn't help themselves with this guy; the instant Jefferson opted out, one of my first thoughts was "Bonner is probably coming back").
Then in the playoffs, when rotations are shortened, who get's left out? Probably Blair at the expense of Bonner. Splitter probably won't be playing as much as he should. Re-signing Bonner would create a mul ude of issues.