There are times when you have to give up a little to get a little.
While Bonner may not be quite up to a Bowen or Duncan or Ginobili on defense, he will certainly cause the opponent problems on the other end, since he can score close or he can score beyond the arc with consistency. He will certainly help to spread the floor on offense. And with his hustle plays, maybe he makes up for the lack of a perfect defense we would all love to see from him.
I like Bonner and think he will be a big part of the rotation this year. He was showing signs of being huge last year, when he got injured and never seemed to quite recover before the year was over. Should be a fresh start for him now.