@CptCrackers Thanks for the update - I'll try doing the same dance you did and see if going from 746 to 813 gives better results. I too have the WPS problem you mentioned. Asus used to make really good stuff, but this set has left me very disappointed.
I'm having the exact same issues as you (#1-3, haven't seen any problems with DHCP). I turned off 6GHz and Wifi 7 mode, and things seem better, but still nowhere near ideal.
If you try the beta firmware, please reply. I'm hoping Asus gets their crap together and fixes this.