"Crowd control" -- as a mechanic or even as a sub-role -- will never be useful within a game which gives every class at least one AE attack, especially while tanks have almost godlike ability to direct aggro. In FF, it's a soloing gimmick.

I'm ambivalent about CC. I've played games with content that was made easier with crowd control, and I've played games where both group and raid content was practically undoable without designated CC unless the group's level or gear had trivialized it... sometimes CC makes a game more enjoyable, and sometimes it leaves so little challenge that dungeons/missions get stale and boring quickly.