People are making way too big a deal out of Tedy Bruschi's decision to return. He is not returning "too soon." The doctors say there is no medical reason to wait. People say he should wait, but there is literally no reason to. He has only two options: return to play, or retire.
No, he doesn't need to make that decision now, but he's made his decision: he will not retire. Since he has his decision, there is no reason to wait to implement it.