I wouldn't be opposed to signing Smoltz to an incentive laden contract for a season. He would give us a quality 5th starter/spot bullpen relief and would probably enjoy having a legit shot at pitching deep into the postseason once again.
As for Willis, if we could somehow convince the Tiggers to take on Lugo's contract, I would be happy to make that deal. We free up the starter spot for Lowrie, get rid of a terrible player, and gain a pitcher with a lot of upside if he can successfully return from his injuries/slump.
I also wouldn't mind seeing us bring in Baldelli, Abreu, or another solid bat to play the OF, as we all know Drew is going to get hurt sooner or later.