I feel like Destiny lacks a dash move - and just like the jump, it should be class specific and evolve with talents. I think it would open up really cool design possibilities for tighter boss encounters.
Also - some form of active blocking is something I'd like to see in FPS games as a standard maneuver/mechanic. Four shoulder buttons are just not enough buttons to enable everything I'd want to do at the same time.
What about you? What do you miss?