It would be neat if there were also a harder version of the regular leveling dungeons too. In destiny they did this where it had more hard mobs that did more damage, etc. for more XP and more item drops. It was pretty nice but overall the dungeon itself was the same just the challenge was slightly higher. If they introduced something like this, maybe have the low tier dungeon drop normal dungeon gear but the high level tier drop dyeable gear with maybe bonus stats that were random or materia slots.

I would love 4-person raids though, one of the nice thing about super-op-unsync is it easier to get groups together for my coil glamour runs because I can never find 7 or 8 people to do it, usually 6 at most.