Have they re-balanced the continental rewards etc? IIRC North America had three borders, but was worth a lot more.
However, I have no desire to play Risk again as the dice mechanic is infuriating and it's almost the opposite of a euro-game i.e. Players can get eliminated a long time before the end of the game and the game length can be arbitrarily long. Also, if a player falls too far behind the other players, it's very unlikely that they can turn things around (excepting the infuriating dice mechanic which can let a single soldier defeat hordes of invaders).
Another major feature of Risk (more or less whatever side rules you're playing with around alliances and so forth) is the role of the cards which pretty much dominate everything else in the endgame.