Went though the game twice. I'm sure as, they mentioned, this isn't final code so some of the issues listed may be fixed, others won't be though.
The demo build is a month or two old at this point. Some of the things you mention like audio, graphical glitches, blurry textures, framerate, and some camera issues are improved in the final game. The art concerns not so much, but that's more subjective and kind of limited by the scope of the demo.