This and only this is what's needed to keep me playing:
(1) unlimited battlecraft, fieldcraft, and local leves with NO reset timer, instead of a 36 hours reset timer;
(2) permanent guardian's favour on all leves; and
(3) either 0 anima cost to cities and favoured destinations or chocobos for fast travel to leve camps.
Gil and item rewards from leves can be on a 36 hour cooldown. I don't care about those, but being able to efficiently level exclusively on leves is the only thing that could save this game.