To be honest one of the things that baffles me about SE is that they haven't taken advantage of the fact that in 8 Mans you can split the party into two completely cohesive 4-man groups with a tank, healer, and two DPS each.

Imagine a savage raid that actually was a raid. Where your goal was to do a speed run down two trash-packed halls side by side with two 4-man parties simultaneously, with mechanics where you specifically have to swap individual members in specific instances in order to clear the fight. Stuff like transferring keys/cargo across from one area to the other, or placing the two trying to swap in a mini-arena on order to use abilities that only that role has access to in order to deal with enemies, or allow two separate arenas to be close enough together that the healers can heal both tanks and/or prey targets in order to deal with one side getting bombarded, or just to barely let you use Ranged LB3 on a pair of giant packs.


Hell that would be a unique enough arena in of itself without having to make it a full-scale dungeon.