I'm one of those people that when you see a side quest, you accept it, then beat the game, then return back completing it. By the time you get to higher worlds, there could be some confusion whether a quest is either a main or side quest.
The idea I'm presenting is if the quests could be organized by worlds. Sorta like that team-up stand outside of the Bazaar, how its formatted could be the way the quests could be organized in. For me it takes up some time for me to flip the quest pages to read each quest, then figure out which quest is which... That's all...