Another one: a skillup system that means Vana'diel is littered with people botting on caster jobs and summoners for hours/days at a time running their bot scripts to cast spells to get skillups.
For a game where the Producer claims he is interested in promoting playing skill, this kind of mechanic is the completely opposite: the only skill you need to to find the right bot!
You find them outside mog houses, by the Nomad Moogles in Rabao, Selbina, etc., or pretty much anywhere they park themselves. The cast at an impossibly fast rate in perfect repeating cycles, totally impossible for someone manually playing the game without using the third-party cheat program with its never-ending macro looping mechanism .. that is if they're not using one of the many bots Google knows about.
A 'skillful' game? I don't think so.