You know what the weird thing is? This is one of the most stable games I own, hasn't crashed once. Despite some missing commands and features, I'm progressing through the campaign without any game-breaking bugs. I'm getting enough tonnage to fill my objectives, so even the smaller issues aren't holding me back.
7 out of 10. 8 if they can resolve the more pressing issues (add the missing commands, tweak morale system), 9 if they can get all the planned features implemented and most bugs worked out, and a solid 10 once the modders had their go at it.
Keep in mind that a 10 in this case doesn't mean 'perfect', but 'fantastic', i.e. the best SH to date.