Blue Mage was also great at hitting all the caps. Some jobs just weren't even worth bothering with these types of "performance-based" rewards system, mainly all pure melee classes.
Again, this is easily fixed by evaluating performance for different classes in different ways.
PSHHHHHHHHH you mean it would require the developer to give love and care to the content and tailor it specifically for the game to be balanced? Get the **** out of here with your "ideas," this is SE, be thankful of your scraps and ask for no more than you're given!