I’d like to think the devs would add the option to customize the rev decks, perhaps losing some cards, but gaining others to compensate.
For example, we lose.
But, we won.
There would also be cards that override others, for example, if we send.
Our card is blocked.
I also wish the devs would add cards that allow new unique units to be trained for revs, but that could be added over time. 
I would also like units like the revolutionary and the like to be able to train in the barracks, there would be exceptions, but I think that the vast majority of players who use revolutions would appreciate not depending on urban centers to use the most iconic infantry of their revolution.
I would also like the developers to make Tupac Amaru II’s “revolution” card an actual revolution for the Incas, especially since they are currently not a civilization that can compete fairly against civilizations with good artillery.
I think with these changes the revolutions would be much more fun, especially since we could give new uses to old cards or a different approach to new cards. 