Melee, and honestly everyone it's just more obvious with melee, have gotten used to just being healed thru everything and not having to worry about reducing the damage they receive. As a melee player (frost DK) and with the healers going oom almost every pull I don't expect the healer to bail me out. I run away from the aoe, stay behind the mobs/boss to avoid cleaves/cone attacks, use self healing when possible (summon sacrifice ghoul, etc.) and pop damage reducing cool downs such as IBF and AMS when damage is unavoidable. So far in runs I've been on I'm usually one of the last ones standing, it's really not that hard people just have to me more situationaly aware than they are used to being and pull out more abilities than they have in the past.