Crashing to desktop after loading a save and then compiling shaders again kills it for me above all else. Also the English script is very weird, I find myself confused about why characters act and say things as they do, it's very unnatural.
I am a long time fan of the series but this needs like another year of fixing for me to enjoy it and I doubt it will get that. I'm happy enough with mods as it is and glad I didn't purchase it.