Here is my custom made damaged glass texture that will replace the damaged state on all cars. I feel that this is much more believable than the default. It's also effected much more by light and shadow than the original, giving it a more true to life look while driving.
I've been using this for a while and wanted to share it with you all. Let me know if you run into any problems. File size is the same as the original, so there should be no problem with performance.
Just copy the file here > assettocorsa > content > textures
HD Windshield Damage 1.1