I've only messed around with the character creator so far but besides a new UI here's what I noticed was new:
Each of the origin stories have a new source point ability that they start with.
Ifan's: Soul wolf, gain a summoned wolf that has stats that are based on level and summoning skill
Lohse: Maddening song, sing a song that causes enemies to attack anyone close to them, regardless if they are allies or not
Red Prince: Demonic stare, drain a target's magic armor and gain the value of it for yourself
Sebille: Break the shackles, remove any negative status from yourself
Custom characters: Time warp, target a character and whenever their turn ends they immediately get a free turn
From what I can tell, you can't change time warp out for one of the others on your custom character right now unless there's a way to do it later on. If you change the race their other race bonus skill changes, but time warp is the same for everyone.