Orbi AC3000 system constantly dropping Wifi

Yes, LG TV can use 2.4GHz and should work that way at 100% power. In THEORY. In practice, the moment the LG acquires a 2.4GHz signal (always from the main RBR), connection drops and TV performance suffers considerably (i.e., Netflix autoplay previews that work perfectly on 5GHz now take forever to load or simply don't work at all). Plex performance (running off my basement iMac server) becomes so slow as to be unusable. The only solution for decent smart TV performance is lowering 2.4GHz to minimum power (25%) so TV always picks up the 5GHz signal off the RBS.

Also, I plan to upgrade the Xfiniity speed (I've sort of inherited the current 200MB/s plan) to at least 500MB/s. Will see how that affects things in general.

As for adding a second sat ... I'm not spending another dime on this Orbi system. As is, the two-unit AC3000 is advertised as "whole house WiFi" for a 5000 sq ft abode. My place is 2400 sq ft at most and the signal is subpar in all but a couple locations (I just had a dropout as I write this!). The other night my wife was in the den trying to watch Netflix on her iPad and the signal dropped so often (spinning buffer) she quit trying to watch her movie in frustration. And the den is barely 25-30 ft from the main RBR! This is pitiul. Does the "5000 sq ft" coverage only apply to houses made of balsa wood?

Today I got an email from Netgear asking me if my issues had been solved (I suppose they can't wait to apply the happy green arrow to this thread). Answer: NO. I have now spent well over a month of almost daily fiddling with the system, trying new router/sat locations, varying power and other settings, dealing with dropped WiFi and rebooting units, etc, etc., etc.

I bought the Orbi system simply to get great Wifi (per many glowing reviews) and, above all, rock-solid performance. Instead, I now have a part-time IT job and none of my WiFi needs met.