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.