EX7300 Mesh with OneName and FastLane hidden network for backhaul

Assuming a tri-band extender (or both bands enabled otherwise), I was thinking that clients would roam between the router 5 GHz-1 and the extenders client-facing 5 GHz while creating a dedicated (non client) bandwidth channel for the backhaul between the extenders and the router 5 GHz-2. It was more from a standpoint of creating that dedicated bandwidth on the router side than purely hiding the backhaul. Giving up the 5 GHz is actually fine because the main problem is a client in the basement that only has a 2 GHz wireless card and had issues with signal strength to the router upstairs and I happened to already have the EX7300 around.  There are still dead spots in the basement and since mesh has matured I was thinking of adding another extender to increase signal strength and trying to figure out options for connecting them up.  I'm probably over engineering the solution and just need to let the router Smart Connect and extender One WiFi Name do it's thing.

Mesh came later for the EX7300 as a feature addition.  Even for the EX7500 and EX8000 it may just be a feature addition for adding onto standard routers where they do not include advanced controls for mesh like you would have on dedicated systems like Orbi.