I'm not going to get it for at least another few months...although I'm really wanting to. Prefer to wait until a few patches have been released before I dive in.
The damage system has always been a weak point, especially with the examples you guys posted. I'm curious Fulmar, what are you referring to with weak AI? The automated workers or sending a unit off in explore mode? Those are the only things I can think of that are generally problematic, otherwise I find the rest of the AI system challenging if you're not playing the easy mode level.