We were in goalie hell while Ullmark was here. He was injured/recovering from double hip surgery while he was here, was just showing what he was capable of before he left. But we haven't had stable goaltending since Miller. Part of that was by design (the tank). But when they started to get serious they didn't have sufficient goaltending in the organization. They were invested in Ullmark and UPL. Ullmark left and UPL is still in development. they grabbed Comrie who was developed outside the organization; a decent move but not a splash. He still might pull it together but so far doesn't seem consistent enough to be an every day goalie. He has a notable weakness with his catching glove which has become apparent after just a short stretch of games with the Sabres.
Maybe Devon Levi is goalie heaven but until he gets here we won't know.