While I agree that every JOB should have its own limit break, I think that giving an individual limit break to each class is a HUGE waste of resources! No one ever plays classes at lvl 50 and especially not in raids or trials where it would be the only place you can actually use it. So all the time and money spent developing the animations for the classes would just be wasted and should rather be spent on something else.

Also, IMHO, Final Heaven is the perfect monk limit break ;-)

TL;DR
separate animations for each job - hell yes!
separate animations for the classes as well - hell no!