Anthem AV remote codes need to be added to XR-15 remote

I've had an Anthem MRX 720 receiver for over 3 years and there still aren't any codes for it in the Xfinity XR-11 remote. Anthem publishes a file on their website containing all of the codes. Seems like Xfinity should be able to easily add these codes to their remote. I've seen several posts in this forum citing this same problem and I imagine the problem affects many more people since most Anthem owners don't bother to complain about this lack of support. Come on Xfinity, please add our codes.