Zach Miller is a tough SOB. He'll play if he's able.
Also, I'm a believer in Kellen Davis... he might have his issues... but he is pretty much the equivalent of Anthony McCoy. He can be a serviceable TE and I think he will do just fine once he finds his comfort zone and settles down.
I also believe in Willson, many thought his athleticism would make him dynamic receiver, but its his blocking that's earning him playing time. I feel like Wilson is going to grow into a complete TE capable of dominating as soon as next year with a full off-season of training and some goals in mind. He's lucky to have Miller has sort of a mentor, teacher, and role-model. Miller is the embodiment of a consummate team player with all around ability, definitely a great football player to look up to and leech from.