I definitely haven't done a lot to make low settings as fast as it could really go yet. There are a few things I will try to squeeze into an update before this weekend.

Do you mind sharing your GPU/CPU? Getting you from 10 fps to 30 means getting it run 3x faster which I'm not confident I can really pull off baring some technical peculiarity pulling more frame time than it should. It sounds like something is up if low isn't disabling shadows though because it certainly is when I test locally.

If you join the discord I might be able to support you a bit better where we can easily share log files and screenshots.

Thanks for letting me know about this issue.