So, the Mistlock Observatory from which we enter fractals of the mists allows us to experience events from “the past” such as the Ascalon fractal, or the Thaumanova Reactor.
Why not add a dialogue/npc to the area that lets us back into other stuff as it once appeared, full dungeon paths etc that have been since removed such as Molten Facility, Aetherblade Retreat in LA, the Twilight Arbor forward/up path, or even potentially use it to relive certain things like Scarlet’s attack on LA.
Since “the mists” are and should always remain unexplained, and the idea is already kinda there, I figure this wouldn’t be a break in lore, and has potential for more content to rotate in and out, even if just to access things that already happened. Drops meant to be exclusive could either be removed or kept at the standard absurdly low drop rates, not everything need stay available permanently, and I imagine some of the possibilities are still in the DAT file (the dungeon instances are still in there as a whole as best I can tell, so rebuilding wouldn’t be too hard i hope).
As for things that are part of the normal fractal rotation, there is no need to remove any of that, was just thinking of a way to bring back some of my old favorite instances and events. Also it gives the possibility of adding things like agony to existing places, recreate them inside the fractals instance but add agony, harder bosses, more mobs, closed doors, different mechanics, whatever it may be.. make it a small test-live for new ideas in old places idk..the possibilities of the infinite mists are boundless