Finally got to play the demo a bit more. I didn't finish the mission, but I did play enough to decide that I shall keep an eye out for the release version. If it's in good condition I will likely buy a copy. If it's buggy or still has a dead AI then I shall curse and hope for a patch, and see after that.

On the uninstall matter, the demo uninstalled correctly for me. I decided I'd rather play a finished version than continue to wander blind in a touchy demo.