The big problem with the EM ratings is lack of people actually rating games. The more people who rate games the better the ratings will be. That said, the EM ratings are a lot better now than they were a year ago. Aside from Rocket, all of the games in the top ten now have 11 or more ratings. The higher those numbers go, the better. I would rate Rocket, but I have never played it.
So the message is to start ratings EMs! (And don't be a spite rater)
Most of the EMs that I have at this point are games that I have sought out because I had previously played and like them. No surprise I rate them high...