I like all of Niqote's suggestions.

I would also like to see more quests. Not like repeatables/dailies, but more things to figure out, explore, reveal more lore, and so on.

Maybe this is a bit of a stretch, but... a general/non-ninja-specific stealth option? More for exploring/scenic stuff than any battle/gameplay reason.

Lastly... I would like it if healers had a bit more interaction with the elemental system. For example, how about if you heal a target on the same elemental alignment as you, heals have reduced MP cost? Or anything really.