I didn't run much in the Crucible during the Alpha (was more interested in seeing the world where I'll pry spend most of my time). Hipfire was okay but there does seem to be an overall greater focus on ADS in Destiny than there was in Halo. Melee felt pretty weak, aside from when you had your special melee ability charged. Finally - Team Work is crucial, only game I really got frustrated in was one where I was on a team that just wasn't working together and subsequently got slaughtered.