I really don't see the benefits to any of these. Titles might be interesting, but I feel that between fonts and our avatars, we can already get a personalized look. Why not just keep adding achievements?
Art directories would be disastrous. How would the ones at the top be determined? Users attempted this is the past with horrid results. I doubt Gaia could do any better.
As for the contracts, how is this any different than what users already do with trades? There wouldn't be any way to reinforce it, other than the mods' opinions on the art received, which again, is no different than what is done now.
Forum wars sounds a bit too gimmicky, though this is coming from a hardcore GCD lurker. I think a revamp of the <3/ </3 system would be better, as for some reason it has been getting a lot of dislike recently. Change it back to the thumbs, or implement some other system to take sides in (rather than hate on) a thread. But no winners.