Each class/job should get their own limit break effect instead of the generic ones.

(These are just random on the moment ideas...Sitting at work bored lol...Im sure I could or someone else could come up with better)

Monks/Pugs for example break out into a flurry of punches/kicks/and spinning around and so on.

Dragoons/Lancers do their crazy acrobatic assaults with a flurry of stabs.

Archers/Bards get their own ranged limit. A storm of arrows for single target or AOE.

Black Mages SUmmon something huge to blow stuff up (Bigger then what they normally do lol)

Summoners summon a primal to attack or something to that effect.

Healers get their own flashy heal limit breaks like Aeris had in final fantasy 7...Great Gospel I think I forgot the name been years since I played that.

Arcansit get a mass DoT attack or something.

Warriors get some sort of attack/defence builder.

Palidans get a defence boost and heal or something.

Just a collection of ideas Im sure people could think of better....but anything is better then the generic limit breaks that we already have.