The one thing I'd love to see is a modern FF using customisable pre-determined jobs. In other words, you do choose the jobs, but they are fixed once chosen. I think that would allow for a lot of replay value and I don't recall seeing such a thing in modern JRPGs. Please let me know if you know of a good JRPG that uses such a thing!
The zodiac job system in FF12 Int. does that and it sucks balls
This twenty-year-old boy was distinguished from childhood by strange qualities, a dreamer and an eccentric. A girl fell in love with him, and he went and sold her to a brothel...