Don't have time to browse the whole thread atm, but I think most ppl chose that option, simply b/c it's not the main issue they have w/ leveling.
I think the BIGGEST problem is that the mobs die way too fast. Pretty much every fight (oh, yes, even the bosses), are just an endless spam fest. Aside from hate control and the combos, there's no "method to the madness" .
I don't mind getting 40k+ exp/hour. What I don't like....is having to kill 83482634862834 mobs to do it.
They need to cut down on all the tp spam and action spam, boost kill times and exp; and actually give us the "downtime" to enjoy our jobs. I swear, you can't even walk away for 5 seconds w/o being a hindrance to the party, even when it's random partying. The mobs die in seconds, so you'd have to just auto someone; and there's nothing to worry about while your fighting. Everyone does exactly the same thing as their same-job-counterpart.
Moving around in battle is tedious, not complex or difficult. They need to implement some sort of system for battle/action usage that creates a unique strategy for every job (not just mindless spam, and hate control). In "the game that shall not be named," as a SAM, you could time meditate and self-SC; as a THF, you could manipulate hate w/ SA/TA; as RDM you could refresh mages to help eliminate excessive downtime, and debuff mobs to help kills move by faster; as DNC you could capitalize on your tp and use it for pt buffs and cures; and so on.....
That is the problem, right now; there's no real effort put into fighting (just dodge bad moves, spam actions, don't get hate, and keep ppl buffed).