I'm in two minds about that
A. Yes he's a good team player and its good that he's buying into the team mentality, he will eventually get a chance to play and show us his stuff. Hopefully it will come sooner rather than later.
B. He should be complaining that he deserves to play... If I was Berba I would be very concerned that I've clearly fallen behind Chicarito and Welbeck into 4th choice. For a striker over 30, coming off his most productive season at the club, having been left off the bench in the CL final, you'd kind have earned the right to express a little displeasure. It would show people that you at least had some of the hunger to change your position. He can't be blind enough to not see Owen, Macheda and Diouf all lined up behind him also hoping for the chance to show their game on the pitch.
Hopefully he will get the chance to show it on the pitch, but if he doesn't take that chance he's done.