I agree. I'm using ax88u with this firmware and it's great. That's way I have asked for axe model. It's my first router from gaming line, and honestly I cannot look at the red webpanel they made. It's horrible. And so many functions that are not important. Merlin is so much better and it's kinda...
So 11.2 Beta 1 was a disaster. Beta 2 and RC uses the same chip FW and on them I had no issues with BT and WiFi since I have installed beta 2. However the whole story with M1 issues keep me stressful on calls, etc.
So I had that validation issue on RC10. But I tried 4 times to revert the fw to beta 3 from RC10 using GUI and then the validation passed. No issues downgrading from beta4 to beta3 on ax88u. 41535 is broken a lot for AX88U.
I'm using QoS and want to use it. There were no issues on beta 3 and on RC9. I have tested the speed on real connection. Tried to upload file on my server. Normally it's 30+ MB/s on RC10/beta4 it's no more than 1.5MB/s. Will wait till they fix that issue. Tested on W10 and iDevices.