[DCR] Improving match-making service for Pantheon

Its a miserable experience to wind up in the Pantheon in a game of 3 real players on one team, and 1 or 2 players plus AI on the other.  It's almost always an immediate concede situation, and a waste of time setting up the game.

A better solution I've been thinking about would be to balance the matchups.  So, rather than have 3 real players versus 1 plus 2 AI, have the matchmaking service balance it to be 1 real player on each side with 2 AI each.  That prevents the obvious waiting around just to have the other team concede immediately.  It also seems that games balanced that way are still playable and can be fun.