I don't know if it's been mentioned, but using a razor naga gaming mouse is amazing for this game. I bought one for 80 bucks and feel its totally worth the investment (works for any mmo and you can make profiles). The best thing, I have 2 buttons dedicated to cycling through action bars, and 10 buttons for all of my actions. Plus click healing is easier than a controller.

P.s. I played ffxi with a controller for 6 years and ffxiv for over a year before buying the mouse last month.
P.p.s . At least the game is decently designed for both inputs, unlike any other mmo.