Heh, it's funny you and I look completely at some things a different way.
Mostly TBS vs. RTS.
Cards can make a major difference, the difference you mention should be added. Sadly, the +gold card is broken, and potentially the person with the biggest army would also get the most cards.
While I like the supply system in Kohan II (and like Kohan II in general) I'm not sure if the same would work here. Especially if the supply is just one resource, one building. They would become the new goldmines you mention and probably not a whole lot would change.
