I think some questy-type objectives that you can fulfill would be a good addition. I don't think they all need to, but having a few would make it more interesting. It would also let you cycle through your deck, which you don't seem to be able to do at the moment. If you can't cycle your objectives, and one has an effect that really helps pull your deck together, you're only going to see it about every 1 in 3 games you play. I suppose the lesson there is, "Don't build a deck around an objective bonus."
At the same time, I don't want a single card that cycles your objectives because I feel like everyone would be playing that card. Unless it's expensive.
I really don't know what I'm talking about though, since I haven't played and the game essentially doesn't exist yet.