In theory, you could move Drew to center, he's good enough to be an everyday center-fielder in almost any ML team.
However, that position is more demanding than RF, so a chain of injuries would probably follow such a move.
Hairston, to me, would be awesome in the utility role, he's not incompetent offensively, he can handle a number of positions, and i quick enough to steal a couple bases.
That would be a great signing IMHO.
He actually makes a good point about Lester, since his jump in IP would theoretically make him susceptible to the "year-after" effect.
But i guess we'll just have to wait and see.