I did run into more or less the same issue in ShB. I finished all the stuff I was interested in and am just wasting my time atm doing basically nothing. Back in Stormblood I would just run content for the sake of playing a certain job, either to get better at it or just because they were fun to play.

I don't know what it is about ShB jobs but I simply don't enjoy playing most of them this time.
So it pretty much boils down to playing a different game.