First of all - he's a class act as you pointed out. Guy got replaced twice in previous destinations by unproven youngsters (the last time right after having a career year) and not one negative peep from him. He actually went out of his way to groom/help the guys who replaced him. That's really something.
I do think that kind of unselfishness is just who he is and reflects what he believes, that the team comes first.
I also think, coming into this season, he had a lot of understandable fear and doubt. Yes, he was determined to come back and we can only try to imagine the courage it took for him over the last 2 years to travel the journey he set out on. But I think he has acknowledged the fear he had to overcome and the doubt that would fill anyone 'can I still do this?'. That may also have played a role in his being okay with sitting back and waiting for his opportunity.
I have a lot of mixed feelings about Alex. So much admiration and respect for him. And he's still under contract. I just don't know if I want him out there. I do worry, as i'm sure his loved ones do, if he isn't at risk for major injury. I'm sure that leg is healed, but he doesn't have the mobility he once did. We saw him take some big hits in limited action this past season. And we saw him get hurt, and more or less have his ability to play the position seriously impacted to the point that he couldn't start a playoff game.
I just don't know if he can play the position at the level we need him to and survive a season under center. But the other part of me argues 'look at what this man has overcome - you're going to doubt him now?'.
I'm torn.