Sorry for the lateness in this response, I went back to my ASUS GT AXE-11000 router for the past week but after playing my Xbox online with xDefiant & Call of Duty the pings & connection were pretty shoddy. I received an email stating there was a new firmware so decided to try out my R3 again. The WiFi speeds were still indeed around 200 Mbps but after disabling IPv6 the speeds increased up to between 800-900. I then re-enabled IPv6 and viola, WiFi speeds were still above 800. I’m not entirely sure if the firmware update was the solution or if disabling / re-enabling was the solution but everything is working as intended. I was using PPPoE to answer your previous inquiry by the way. Thank you for taking the time to respond to my issue and thanks to Netduma for this awesome gaming router
TLDR; downloaded new firmware, enabled IPv6, rebooted, disabled IPv6, rebooted, re-enabled IPv6 h now everything is working as intended