Since it' a playtest i'll leave my comments
Firstly this is great, really really good stuff, i am going to have fun playing this
I noticed that the Sealer is missing from both the first Index and the Job Index
My main crititique is that the "Choose a new job" feature is not very well explained, i would guess that you can gain the abilities of the secondary jobs and the traits of only your active job, but i can't find a place where it's explained in detail?