I would love to be able to level sync and grind mobs in the overworld for xp instead of having to just rely on fates and roulettes. Some of my best mmo memories come from xp parties where you just set up camp, grinded on mobs and had some fun chitchat while you did so. I made so many in game friends that way that it was crazy. Heck I still talk to some of them 20 years later. Nearly everything being instanced in this game, esp leveling, is a big big big drawback for this game