yes you can.
my old set up: AP - wireless - Mediabridge - wired - PS4
and new set up: AP - wireless - Aimesh node - wired - PS4
Could you check if it turning on and using the guest network?
http://router.asus.com/Guest_network.asp
I had an issue with the new firmware and media bridge where it was turning on the guest network to use for the bridge.
https://www.snbforums.com/threads/rt-ac68u-version-3-0-0-4-384-10007.43114/page-2#post-370988
I dont have issue with mediabridge mode after update the firmware. I was actually using mediabridge mode while research how aimesh works.
didn't find much info so I decided to just give aimesh a shot.
try to factory reset and power cycle (unplug the router ~30+ sec), it often solve any weird issue that I experience after major firmware update or swap between official n merlin firmware.
I was initially having trouble to search for nodes, but solved after I factory reset n power cycle both routers.
neither my router has guest network turned on and didn't experience anything out of ordinary
so there is def something wrong with mediabridge, could be the new landing page that help you switch between different mode
already did no responseRP is repeater, it's different product and not listed in the official aimesh page.
you should ask in the official firmware thread to get better answer
Welcome To SNBForums
SNBForums is a community for anyone who wants to learn about or discuss the latest in wireless routers, network storage and the ins and outs of building and maintaining a small network.
If you'd like to post a question, simply register and have at it!
While you're at it, please check out SmallNetBuilder for product reviews and our famous Router Charts, Ranker and plenty more!