Back when 2.0 came out, some ARR dungeons were very difficult to pull wall-to-wall. SE's has mostly addressed that in future expansion dungeons as well as going back and reworking ARR dungeons. For the most part, the party's toolset is designed for these pulls. Between the tank's mitigation, healer's kit and DPS's AOE burst damage, it is expected to wall-to-wall pull. And frankly, if you die... then you die. The time lost in that ONE dungeon might be small, but the more skilled players the server has, the faster everything is completed as players learn.