This is just a little suggestion, not one of super importance, but along with all the changes coming down the pipe, I think it would be nice if we could assign items to slots on the action bars. I never remember that I have them, and if I could equip them to the action bar then they would be more visible and I would use them more often.
I believe the action cost of skills are going away, but until they do, or if I heard wrong, and item shouldn't cost anything to equip.