I think it would be cool for those last cards to be added in, for the sake of completion at least.

My problem with the game is not so much the mechanics but just the lack of award. I think I could overlook a lot of things if I felt like I was actually rewarded for winning. Some chump change for a game that took a long time to win isn't fun at all and I was also a little surprised that the first tier for the achievements is ten games.