I'm not.
I'm disappointed that both graphics settings still result in a large amount of gameplay around 20 fps. Hopefully the "demo" is more or less a "beta", and performance will improve. Increasing both the graphics settings and the screen resolution seems to make no difference to frame rates, which seems to suggest there's issues with the game. Hopefully these get fixed.
If after some updates frame rates are pushed above 30fps consistently for Advanced settings at 900p, I'll be happy.
I wouldn't count on it. It's near the release date. If anything, I'd say it was the actual version that is to be released.