Completed a game, Commonwealth AI beat me!
Yes, great end. I believe this is important to stress to the player the necessity to capture as many locations and installations as possible.
My conquest of New Colony this time was slower because I deliberately did air attacks a turn before doing land combat in several regions. Thus I didn't start crossing till something like turn 13.
The game has replayability because the player is going to have to try different tactics several times, and different card usage.