A "hub and spoke" raid of 6-10 bosses.. Minimal but challenging trash leading to 2-4 bossfights pr. "spoke".
More fights requiring awareness and class abilities instead of hard dps checks and simple tank swaps.
i like this idea, however adding to it maybe in certain parts of the operation the raid is forced to split up and get things done in a certain amount of time. 4 one way and 4 the other each group fights a mini boss's(also add linking mechanics where say if the interrupt is missed on "x" ability on one boss than the other boss would produce some god awful raid wide aoe) then is forced to split yet again to 2's. If you don't complete the tasks it adds buffs and such to the final boss or maybe even just buffed trash on the way to the final encounter.