The latest CM/CSP/Sol combo is extremely stable for me (980ti/6600k, both stock) with pretty much everything active. YMMV of course but if you're unhappy with being a beta tester then wait for the official release. You speak as if you are using a finished product rather than one still deep in development.
Why not just deactivate the individual parts of the CSP that are causing you issues? It's a simple tick box in each section. You can then maybe isolate the troublesome section and have a better overall experience.
Or use vanilla AC, of course.
I did determine that it was a combination of new and old ini files for various tracks that was causing at least one of my big issues (flashing textures).
By default, CM will download the required ini's for tracks (and cars) as you load them. This sounds great, until you realize that, if you've upgraded from CSP 49 (the last release to contain a full set of config files), you've still got all these old config files (which are now presumably surplus to requirements) that are now getting mixed in with the new, freshly-downloaded ones. This can produce chaos.
Bottom line: Don't use CSP 49 and then upgrade from there, if it's your intention to run the latest CSP. It's cleaner/more reliable to start with a later release (that's config file clean) and then let CM download the latest configs as you go (or supply your own, as part of installing your mods - as not everything is on the Github repository -
https://github.com/ac-custom-shaders-patch/acc-extension-config).
I ran out of time last night, but I'm hoping for a miracle re: AI cars turning on their lights appropriately. Without that, it pretty much kills the whole point of having time-of-day changes. Your race is over the minute the sun goes down.
The entire process is still far from clean. It's still very easy to accumulate detritus (in the form of old, outmoded ini's) in your extension folder and no easy way to know which files go with the version of the mod you're running. When you then add in additional permutations (Sol, mod versions, filters, etc) of what's available, it gets messy fast.
Reinstalling is not exactly easy either, since, if you delete your extension folder, you lose all the config files that got installed by your mods.
You'll then need to go back and reinstall every car and track mod that included files intended for the extension folder. It's possible that the files on Github will save you, but they don't have every single mod covered. So you're stuck with laboriously going through and figuring out exactly which mods need to be reinstalled. Messy.
Oh well, I guess it's a hobby. An occasionally frustrating one
….. it's just another weapon to add to the arsenal of an ever youthful AC. Long may it carry on.
"Yeah, but it's not this one super specific model that I want, therefore I am not pleased". 
).
