I really dig this game. The game play and the dynamics of various squad combinations is great. My complain, like many others is that the bonus content is hidden unless you go to Kongregate (ergo the 4 instead of 5 stars). I get the reasoning..... but I wonder if a solution could be created.
Are you using LocalSharedObjects to store the game state? If so, could you write a script to migrate game data from New Grounds to Kongregate... and import function so to speak? Certainly that would be simple enough. Export the data to JSON and import the same data. Just thinking aloud.