My main issue is that the relic progression is a bit weird. You cannot obtain rank III points until level 90, meaning that if you're leveling a crafter you will quickly cap ranks I and II, and then get stuck. Your relic will also out level you fast so you can't really use it that much, not even at level 100, until it's fully upgraded to ilvl 720.
A new type of mission unlocked at level 70 would've evened things out a bit more, imho, with the top A-level missions staying as the overall best for the different types of points or progression.
I don't like DoH/DoL content much (except fishing!) but I'm still engaging with it because I find it alright and I'm learning about crafting, which I've avoided before. It's cool that the more enthusiastic people are getting stuff out of it and it's definitely content that can appeal to the more casual audience, which the expansion has lacked for a whole year.