wcs2228
3
If I understand correctly, you want 2 Opal’s (currently 3 old routers) because your house is too large for 1 Opal. If so, then I agree it is better to have both Opal’s connected to Beryl over WDS with the same unified SSID and password.
I am not in favour of inserting a switch into the communication chain because it is another single-point-of-failure, takes up space and requires a power adapter/electrical socket. It would have been nice to have more Ethernet ports LAN ports on the Beryl, but it is actually a compact travel router.
You can also consider setting up a mesh network and GL.iNet has models for a mesh.