Since Trusts became a thing in 5.0, SqE could experiment with more explorable dungeons with options, and it would be possible to use Trusts, either specifically made for that dungeon (e.g. if dungeon isn't msq, but optional), or the normal Trusts (if msq).

Another thing they could do, could be that the dungeon could have different NPCs you meet throughout that may help you like with the Ghimlyt Dark, or slightly hinder you (not-quite-Trust escort mission? Probably not a popular idea).