I read through the documentation after releasing my first game. I didn't check the payouts yet today, but it looks like it will be similar to yours. Rating was only a little higher; definitely not as high as I would have liked.

For players that bought packs during beta and held onto them until game was released, there was a reputation boost. I think that having reputation boosts and higher rarity developers is how games are getting high ratings. The name and description is supposed to be a factor, but it's likely a very small impact compared to developer rarity and reputation prior to game release.