Honestly we have everything already once Ninja is added.

There is a ton of things missing from this game. but Yoshida will have to get away from pure dps, pure tank, pure heal only mentality to add more unique jobs.

We are missing support classes in a major way in this game (Brd does not even really count it is so restricted in its songs). There is no crowd control at all, although they are designing it to be unnessasary. And there is no Debuff class.