I would like to see some larger dungeons. Older FF games most dungeons you are going up/down floors, backtracking, fully exploring, etc. Dungeons in FF14 don't really feel like that, they feel very linear as a poster above mentioned. Haukke normal mode is about as close it comes to old school dungeon style (keys to locked doors, multiple floors, back tracking to newly opened areas). I'd give my lala arms for something akin to the temple of the ancients/gaia's cliff/northern crater from FF7.