I would like to point out that in TF2 achievements worked at release, you could easily get into maps/games, and flat out its just plain a great game. Also TF2 sold in the orange box which was a freaking amazing deal.
70 is actually pretty generous for demigod. It still has connection issues, you have the gameplits floating around, when someone rage quits they can very easily take half the game with them, favor doesn't work, it has a lot of bugs that need to be ironed out. It still isn't acceptable release quality.
Demigod isn't a multiplayer only game. It is a multiplayer focused game where the multiplayer has a ton of issues and the single player is pretty much non-existant. If the multiplayer worked great, sure 9/10 would be appropriate. Its really still a 4/10 game though.
Demigod in all honesty deserves a much lower score for the trainwreck we were given. It is just starting to recover. Instead of worrying about the review scores stardock/GPG need to keep making the game better and figure out how they are going to make things up to the players who they screwed over at release. I would say reclaiming the players they drove away and repairing the community is of more importance than review score right now.