A good rule my friends and I play by is to have the army return increment on cards increase by 1 each time.
The first to turn in cards receives 4 armies, then 5, 6, 7, 8, etc...
The cap is 20 armies if we make it that far.
We find this makes for a much more balanced game overall and doesn't get so instantly lop-sided later in the game.
I would very much like to see this option available.
Thanks for all your hard work!