Slitherine

Love the game but I think the early Battle of the Bulge main scenario early victory condition ( get an unit in supply across the Meuse) is too easy for Axis, especially but not only versus Patton AI. Ive found myself several times just in at the point where I think - oh, the Patton AI is really threatening to break my supply lines now and trap my forward divisions, and then on the same turn or so, I win early victory, which means I don't get the fun of trying to deal with AI's entrapment strategy and seeing how good Patton is in this situation.
I think this early victory situation also tends to make the VP earning goal of moving Axis division off the map to the NW a bit redundant
With all this in mind, here are some suggestions:

1) make early victory for Axis in the main scenario much harder (you must get X number of VPs off the map to the NW, say) or even remove early victory for Axis. These could be options in settings rather than fixed.

2) maybe make different levels of victory possible ( marginal to overwhelming victory etc.) so players can continue even after winning an early victory on either side - they get to play on for a larger victory (so if Allies win a technical marginal victory before Xmas, they can go on to try and use the rest of the time to throw the Germans back to the East). Again, this could be option rather than fixed.

You would not have any good AI in the later game then.

The longer the game the poorer the AI, because there will be more options for the AI to choose from.

Try to play with other players instead.

In addition, the Shenandoha studio should work out some means of 'effective' communication between players over the Game Center.

AI should ideally be fairly decent over the whole course of the fixed maximum game length, and anyway, I'm talking here any about the Axis AI preparing a strategy in the early game that is nipped in the bud by early Axis victory conditions on Dec 18/19 just as it gets going - it needs at least a day or two longer to have an impact (which would still be in the early mid-game, pre-Christmas)
(I'm already playing with other players... it'd be nice to have an option to continue playing beyond early victory conditions in multiplayer too)

Allied early victory conditions could be tweaked to be harder too... (although having the marginal victory option to play on to major victory would fix this too) would the Germans really be repulsed and give up with a few division losses after a couple of days...