Well the problem is that originally Final Fantasy XIV never had jobs. Classes existed alone, along with the ability to use cross-class skills. Classes weren't dedicated to an exact role. Thaumaturge had healing and debuffs and Conjurer was the Elementalist.....a lot has changed. Jobs were added later as new content to "specialize" the classes. However, once jobs were introduced and the system got an overhaul, they didn't really balance it...jobs were basically just an upgrade. I don't think the problem is the class system....it's the job system and how it was implemented. It may have been better if Jobs had been something you unlocked and leveled up independently.