@PeppeL OK, then forget about ISP router/modem brand and model. Not that important. It is an option to start with Deco mesh as in place replacement for Asus. That might be enough and if not, or if...

@PeppeL One more thing. If Asus Lyra mesh units have Ethernet backhaul and you like the idea of Ethernet over coax, I would suggest you add MoCA adapters first. Then, try Asus Lyra with Ethernet...

@PeppeL TV wiring is absolutely the option and it is as good option as Ethernet cable. It is superior to powerline. The technology is called MoCA. Here is general idea: You will need MoCA adapters,...

M3rl1n wrote @Alexandre. I'm aware there are ways to "bandade" the issue, however I'm not willing to do that. If I spend my hard earned money on a system I would prefer it function as expected....

@M3rl1n You can force devices connect to 5GHz band when it is available. This will not fix 2.4GHz band issues, but at least in theory should move device back to 5GHz band as soon as it is available....

@PeppeL Without going into unnecessary technical details that we can leave for networking gurus, I would suggest choosing between X50 and X55. They seem to be more loved by TP-Link when it comes to...