Blizzard has responded to feedback on Delves announcing difficulty and reward tuning that is partially in today's build but will likely be ongoing.
From your feedback and from our testing we saw that delves became particularly punishing throughout level up, and that many specs felt like they had to be several item levels higher than the recommended item level to survive.
We’re continuing to review the tuning for classes that are struggling in delves. We’ve seen your feedback on which classes are having a hard time.
We also have our own data that shows performance in each delve by class and spec. We’ll be using your feedback and our data points to help improve the experience for players that are struggling.
Keep it coming and we’ll keep you updated!
We’re modifying how many keys players can get per week while also increasing the base rewards from Bountiful Delves so they’re still worth running even without any keys.
We’re still working on balancing these numbers so please give us feedback as these new systems come online!