I have to say that I truly appreciate CG at the very least asking for our feedback in a very direct way and trying to collect data around it rather than "are you happy".
That being said it always surprises me that we live in an internet age where communication should be easier than it ever was and yet for whatever reason people always shy away from. In the customer relations business over communication, even without content, can help ease some pains.
Something on the lines of "Your feedback is being gathered and is appreciated. From what we have seen so far we can tell that you're facing challenges with the new raid and while we want the raid to be challenging we want it to be fun and rewarding to. We are taking your feedback and deliberating internally on this and will work to try and come up with a solution that addresses the concerns while still keeping the integrity of the raid itself intact."
Feel free to edit and personal flavor as you see fit. Nowhere do I propose an actual solution, give a timeline or promise anything apart from discussing internally. It just lets us know you hear us. I mean we know you do unless you lost your log in credentials. But telling someone you'r e listening can go a long way. All I ask in return for this sage like advice is 3 Ugnaut shards.
Also it doens't hurt every couple days or so if the villagers are still waving pitchforks in the square to repeat the same message. It let's us know you haven't forgotten us. While some will say patience is needed, and I agree, it's just good customer service to acknowledge your customers on a frequent basis.