I can't even use Facebook without it freezing anymore. I'm using containers and locking down on tracking (no umatrix or noscript though) and Facebook literally craps itself everytime I have it open, helps keep me off of it. It must be my exact setup cause I do the same setup on every laptop / workstation and it slows to a crawl, though mobile.facebook.com works just fine... oddly enough. And I know if I use a vanilla browser it works just fine...
Search discovery is by far my biggest pain point, and I say it as a fan.
I disagree with the GGP (I think) about Facebook wanting you to wade throw a river of crap so you stumble on ads. Their ads have been spot on to my interests so far.
I think an onioned version of Google plus circles could help Facebok influence the AI without preventing discovery.
But TBH, had G+ really been a contender at this point? This sounds like the creak of an abandoned house by now.