Do we know if there will be permanent PvE choices in the game? I Know we can raise our faction allegiance and in some dungeons we can choose to save mercenaries and condemn others...but are those choices reversible? If we go back into a dungeon again or later decide to switch factions because of the rewards, can we do so?

I am concerned with this type of game that if you make a choice early on with a faction then find out the mercenary/card you want to use is with another faction that you get hurt by your decision...