I have the 5300 and the past 2 ASUS firmwares have been dropping my 5Ghz SSID. I think 3341 was the last stable one for me. I have also been getting random reboots. Nothing shows in the log when these events happen. The router was stable for 6 months then started doing this right after the firmware update. I tried reverting using the recovery tool and tried Merlin. It seems like it permanently messed up the wireless.