The 60 - 70 DRG totally makes up for the disappointing quest line that came before it. I highly recommend doing it if you are a Heavansward enthusiast. As was mentioned the DRK quests are amazing from 30 - 70. The RDM is also really enjoyable as well. I think it really depends on which kinds of stories reach and speak to you.

Do you prefer an adventure story? And introspective and deep story? A story where you become the best or help someone else accomplish thier goals? I've done the majority of the class quests to 60 (my goal is to level all jobs to 70 to see thier stories, yes even SCH) and I find the stories where I help build up other characters as support appeals to me most.