I like Lannan but I agree if we could move him for a useful piece that would be great. I really don't see him as more than a 4th starter on a winning team.
He's been better than a 4th starter for his career, till so far this season, where he seems to be stepping back a bit. I would generally evaluate him to be a bit better than a 4th starter, but I would agree that if we could get an important piece - say, a quality right fielder, that we do that deal.