I know this has been mentioned before, but how about at least one single player game for those that have games running but no one moving while they are here, then players may stay logged on and play for a while, rather than trying to start more new games without people moving.
Also mentioned before was working on a multi-player game.
Neither of these seem to ever appear on the Features in development (sorted by priority) list, but would both help BrainKing get even better.