Yeah, drops below whats feels like 25 FPS and even complete freezes on XOX for me.
It's joke. They are such a big company and instead of really commiting to making a real, huge alpha/beta, open for all, they are writing letters with warning about bugs and problems at launch. Technically it feels and looks like some kind of DayZ/Rust early access thing. It feels like a game with bigger budget thanks to audiologs/VO, interface etc. But holy crap, switching from RDR2 to this feels like playing GTA3 after GTA5.