I'm not sure about trading Happ. We've been incredibly fortunate with pitching injuries the last couple of years. There's always a good chance that someone blows out there arm in spring training so we need that depth. There also aren't that many dumb GMs around anymore who buy high on that kind of player. You'd get innings eater value for him, not meaningless stat value (20 game winner).
I don't really understand why everybody likes Josh Reddick as well. He's not a particularly good hitter, nor is he a particularly good fielder. I know he doesn't cost a draft pick and that he's better than Michael Saunders but I think he's going to be overvalued in the market because of his relatively young age, sort of like Heyward was.