I started working on my black mage and I enjoyed it for a while but once we got to 2nd coil my outlook change.
All the movement disadvantages really annoyed me, all the constant casting interruptions etc...so even though I had i100 weapon for BLM, I switched to summoner and got UAT. Now I main a summoner and 2nd coil is a lot more enjoyable for me.

So just because you started progressing on the novus questline shouldn't feel like a reason to continue playing a class you don't enjoy