Just add a "training room" with a dummy with an adjustable level, all skills and abilities have no cd and can be used immediately after its affect/animation, a data chart showing numbers such as damage/heals/Dot/Hot/gear comparisons and a jukebox with classic Final Fantasy music from FF1 to FFXIV.
Heck you can even charge 10 bucks for it and I would still pay it just to listen to the music.
