I don't see why everyone thinks its Utley vs. Polanco. Career stats for prospective Phillies infielders......
Utley 251/323/433
Bell 252/314/395
Rollins 261/316/389
Polanco 291/336/398
Bench either Bell or Rollins. Polanco can play their positions well, so move Polanco into one of those slots, and keep Utley at 2B.
Bell is having a better season than Polanco, so I see no need to move Bell in order to make room for Polanco.
Rollins has been hit or miss (mostly miss, but he's been better lately), so if I wanted to sit anyone, it'd be Rollins.
It's not that everyone thinks it's Utley vs. Polanco, but it seems pretty clear that Bowa sees it that way, which is where the problem lies.