>>384715030
Figured I'd mention that I found an application being worked on that let's you install the plugin to your game library on the fly. Even better, it gives you the choice between 3 different plugins so you can test each one out to see what works best. 
https://github.com/tappi287/openvr_fsr_app/releases
For whatever reason, only the CAS method seems to make a difference for the games I tested it on, but the FSR plugin has a dramatic improvement. 
Just happy I read your post because I couldn't handle what a pain in the ass it's been trying to make anything look decent enough to play on my headset.