Just want to chime in and say i'm expiriencing similar degradation in performance.
had 1.25 SS and 1.5HMD quality until yesterday, everything ran fine inside stations.
Yesterday updated to nvidia drivers 387.92 (oculus home did update as well actually) and now getting bad judder inside stations, had to remove SS completely to somewhat fix it. with 1.0SS and 1.5HMD quality there is still minor judder.
Glad I'm not alone... Sort of.
To me, things are pointing to something in the Oculus software, as I've rolled back to the previously known working version of the Nvidia drivers. That said, all I did was a clean install, which supposedly removes the existing ones. I'm going to try and remove all Nvidia stuff an reinstall from scratch to see whether that makes a difference.
Would be interesting if someone using a non Nvidia card saw this thread and posted, as if they have had issues too, then it's likely not Nvidia.
Computers. Don't you love them?