That's a big con for me against console gaming in general. My Xbox One X is strictly for offline, as I refuse to pay to access part of a game I already paid for.
In terms of performance, I've been playing a little more, usually a few matches on weekends against randoms, and I have not been having the issues you describe. I'm very curious as to what's causing them.
Yeah, I don't think it's everyone by any means. I think it was subtle enough some might have not noticed, but I think anyone having it now probably would. A number of people complained
here after the patch, but I think it's far from everyone (I'm obviously complaining there too). IDK what we might all have in common. Seems like there would have to be something.
It looks a lot like what I would imagine shader or sudden GPU demand would look like. It's not totally dissimilar than what the performance issues look like on the Switch version. But it almost looks like GPU demand goes down (as near as I can tell from an Afterburner plotter line) so maybe it's hung up trying to finish some other part of the game loop for a frame. The fact that it's completely unresponsive to destressing the GPU makes it seem like it's something happening elsewhere.
Network and extra processing overhead are the main things going on when playing online that aren't happening when playing offline, so I started messing with network stuff. I actually ended up with lower pings and 1-3ms ping swings on average instead of 6ms. Hellbringer and I's ping went from around 200ms down to 178ms. Maybe it was coincidental and my ISP did some stuff. I feel like it's good but then people claim to basically have been locked out of online play entirely since aftermath dropped so maybe something changed there. Reaching to matchmaking servers and sending inputs peer-2-peer probably aren't the same though.
My CPU was pretty good when I bought it, but isn't super remarkable at this point (Ryzen 1700) It should be able to handle it and it runs at like 15% offline, but I'm not sure what the rollback processing might do. Seems unlikely I'd be chocking up on processing the rollback frames, especially given it was fine before, but it's about the only thing I haven't touched. My MoBo will take 2nd gen Ryzen CPU's so a couple hundred would give me a moderate bump there, but hard to see that helping. On the fence on doing that upgrade.
The only other thing I can think of is Denuvo checks. I would expect that to be a more universal issue though. That's about the limit of my hypothesizing powers.