Miz has great stuff. I trust him the least of all our starters, though. He seems like a clear playoff bullpen guy, but do I trust him enough for high leverage? I don't know.
If we can't get Hall, Megill, etc. back, I think Miz has a spot for sure. If we get some guys back, though? It might be best to shut the guy down. I can imagine a few scenarios where he's only a mop-up type option, and, at that point, why push his arm?