Its one of those good in concept bad in practice ideas.
Honestly I sprint through it on my Druid and DH to just get the darn thing done. Not so much because the gameplay is not fun but specifically because there is no reward for doing it (once you get your soul ash).
Put stygia in there, put mounts, pets, items/currency etc it might give me something to do… right now this xpac is just hollow and lacking gameplay (mostly because its all time gated).