Having to wait until the end of the game to learn the cool skills like X-Magic and X-Fight is a pain. I'd like to earn these skills earlier, but you don't meet enemies that give you good AP until the end of the game. So you have to fight too many ramdon encounters and/or leave your character equipped with a class to learn those great skills, which is kind of a pain. In FFIII you could change your job to fit the need of the situation, and if you can do that in FFV, but you won't learn the abilities as quickly.