I would be much better at solo dyna if I had any measure of patience whatsoever. I make a lot of risky pulls and pay the price.
Teamed up with a mage, though, I tear it up.
To be honest, DNC excels at Dynamis Nouveau (and virtually all "old content", it's decent in Abyssea despite not having procs (having a lot of power, just not much utility), and it's actually quite effective in Voidwatch, providing an excellent source of spike damage during synchronic blitzes, and offering a lot of JA procs which can be spammed back to back to get a lot of hints at once. It can also keep itself alive pretty well with nothing more than waltzes / a basic mdt set / fan dance and fanatics drinks when they're available, requiring minimal attention from healers.
I have begun to understand why adjusting it is not on the dev team's priority list.