Quick update…a few weeks ago I finally had it with my current setup and ordered two Amplifi routers (not the kit). Setup was mostly painless once the secondary router downstairs updated automatically (they require a firmware update to do wired backhaul). My home coverage is much, much better, and I can even get pretty far from the house before I lose signal. I also noticed my phone stopped doing all the wonkiness when it switched routers under the old setup. So generally I’m pretty happy with the new units.
There have been two strange occurrences I need to investigate. First, about a week after setup of the routers my powerline adapters, which have worked flawlessly for something like two years, started losing sync every day or two, causing the downstairs adapter to lose the connection and the downstairs router to go offline. I find the timing really weird, but I can’t think how the routers would possibly be affecting the powerline adapters.
The other thing, about a week ago I noticed my phone was dropping off the wifi for about a minute, and then would rejoin. I have a Nexus 5x which I run an app on which monitors which cell carrier it’s using, but also tells me when I drop off the wifi. It showed several occurrences of this happening a day. I don’t think it’s related the PLA issue because it happens even when I’m on the primary router. Also, when the PLA issue happens it won’t clear up until I unplug and plug it back in.
So, not sure if this is an Amplifi issue or not. I probably need to reset the PLAs completely, then monitor for a bit.