I just did a delve in Craglorn again on my main character. The dungeon is about right in terms of hardness. The last boss battle was a challenge but was very fun. It forced me to use my pots, heals, and think about when I should use my skills.
However, I felt let down in one aspect. I already did all the delves in Craglorn. All I got for a reward is a paw full of gold, some junk items for decon, and some XP. What reason in Update 12, do the people like me who done it before have to redo the delves? I can only think of two reasons: 1) doing a quest there 2) just change the white icon on the map into a black icon (not a very good reason really).
There should more reason to redo the delves for those of us who done it before. A new achievement? More Dyes? A title? another type of reward? Farm for an item or mat?