The jobs are mostly fine. People who want more complexity are in the minority by far. The vast majority of the playerbase is "casual". There's nothing wrong with that. If you want complexity then go find it in difficult fight mechanics. Job rotations should stay relatively simple because they're what everyone has to use. Some jobs can be harder than others of course, but rotations shouldn't be too complicated. Black mage is a great example of this. It's one of the hardest jobs to play, but the rotation itself isn't hard at all. It's about adapting to the fights.