Man, the choices you guys made ended up with you skipping so much stuff. They advise that you should be level 8 by the time you leave the underdark, and you're only 5 (even with all of the bonus exp I gave).
We... broke the game? We broke the game. Time for side quests?
The only side quest that could really work (from my view) from an RP standpoint would be if you escorted Stool back to Neverlight Grove. Either that or we can skip the XP and have a level jump.
I don't mind XP based systems, but it's mostly why I don't like premades. I'm very XP loose... I level people up by milestones rather than by specific actions. If you kill 3 kobolds but complete a thing, LEVEL! If you kill 40 orcs and complete the same thing, LEVEL! And loot. Orcs have better loot. Let's kill the orcs.