I also feel like the stutters might be caused because the game might constantly be recompiling shaders causing permanent stutters
The last successful solution to the stuttering problem that I saw was something very weird. The person replaced the CMOS battery on their motherboard so their system time was able to maintain accuracy. Instantly fixed. It does underscore an issue with the game that we are working to fix also because this shouldn't cause a problem but it might be worth a shot.