You can nuke the bundled_ shader_cache.hans and play without it to see if it makes any difference, the game is capable of running shaderless hansless just fine 
However i saw 0 improvements playing like that, 0 impact on the existing issues and i don’t think shaders or the PSO files corruption has any impact on performance outside busted visuals when playing on High textures!
Furthermore deleting shader cache like that will very likely corrupt the PSO library and will take few session for it to rebuild properly, which again doesn’t matter performance wise or for people that play on Medium, but it bears mentioning that deleting the shaders causes its own set of problems