Towards the end of the year last season, Horford really meshed well and found his role here. Seeing him adapt like that, I feel like he will age gracefully into his role here. He doesn't even need to be the 3d best player on this team, (even if he is).
Horford will make it work, and his role here doesn't require him to dominate. He just needs to affect the game in a positive way, and mentor the youth like he did last year.
My only concern is the wear & tear that may occur from him banging at center all year. Hopefully BS doesn't grind him too bad, and offers some relief in a long season for our oldest player.
Go get em Al!