Cool, tough mechanics you'd like to see in future fights

[Kiokin]

I'd like to see a boss fight that requires movement. Kind of tired of every boss fight taking place in a round room. Have something like a gauntlet to traverse with the boss, using some kind of one time use node to shield the party from an ultimate, then having to move on to find another node. An off tank would have to pick up patrolling mobs for the group to deal with en route.

DPSing a moving target as melee is the worst thing ever in this game. Do not wish that upon anyone.