I'm happy at least that DRK is in its best place since Stormblood came out. Obviously there are still improvements than can - and hopefully will - be put in over the course of the coming months.
As for me at this point, I really only have a single, simple request. That being if your Dark Arts buff expires before you can use it, the MP spent be refunded, even partially. It sucks in raids, since there's plenty of examples of bosses becoming untargetable. If you were about to do a DA action right before the jump but didn't hit it in time you've just wasted 2400 MP, which kinda sucks.