How is Morneau your biggest deficiency?
I'd say 3B and OF (in that order) are your weakest. Never ride out a player's entire hot run. Guys like Bloomquist are NOT going to perform this way all season. Take advantage of the fact that, for whatever reason, he has believers, and trade him with Gomes (another hot starter) to get an upgrade at 3B. Once Hanley starts hitting, you could then use Castro as bait for an upgrade in the outfield.