Plus, Avalanche has to program the Power Disc into the game. Power discs just unlock the item, theme or ability in the game. Since they have to do this, you could play in your game and through online play, the data in your friends game could import to your game. As I don't know how much info the disc on the figures hold. 1.0 might only hold enough for character name and level. 2.0 holds more because of the skill trees info, which transfers when your bring yours to a friends house. 3.0 holds more. This data might not transfer through the RF chip in figure base for older figures and this maybe why no update to figures.
If they made a playset for Disney figures similar to the Marvel playset, Maybe then update the all the figures for inside the playset only.
Where ever you go, there you are.