I have 2 Deco X90s, one on each side of my house which seems to work ok.  I do have intermittent spooling issues, but that is probably Spectrum.  Even though I pay extra for their 500M connection, their signal coming into the house is terrible and nobody seems to care to fix it.  Anyway, one Deco X90 connects directly to the Spectrum modem and the Ethernet port of that one connects to a hardware switch.  My question is, should the Ethernet port on the second Deco X90 be connected to a switch as well?  In know the signal there has to be weak as I always had difficulty connecting to WiFi over there, thus the reason for the mesh system.

I actually have 4 switches in the house.

1. Downstairs where many of the individual rooms are wired to.
2. In the living room and family room where all the entertainment equipment plugs into for internet access.
3. And one in my office where more computers, printers and scanners plug into.

Guess my question comes down to, how do the Deco X90s communicate with each other and would they work better if both were connected to the switches?