Disagree about the skill-set being detrimental. The success of Pop's offensive system is heavily reliant on spacing. I mean, how many times did we say that RJ absolutely killed the Spurs because he wasn't in the right place or couldn't make the shots when he was in the right place. Bonner provides the spacing for Tim, Tony and Manu to operate in the paint. And he converts on a greater majority of those shots than any other Spur.
Am I thrilled about his performance in playoff situations...no it kills me. But, don't delude yourself into thinking the Spurs would fill out a roster without having that skill-set included. So, if not Bonner then who for the money they had available?