This idea is something that I personally have always wanted to do, and I want to know what you think of it:
The balance of the units is the way it is in large part to make the campaign work. This, however, does nothing for the multiplayer battle mode.
What I would like is, with help from the community, to create a special balance just for the custom battle units (more than possible) that would make that part of the gameplay as interesting as possible. Things like special units/stats for different factions, special strengths/weaknesses, etc.
Then, as we have the possibility, I'd like to create a dedicated server for the mod custom battles with a site dedicated to rankings. This, I think, could be more than interesting
What do you think? Who would like to participate in creating a singular balance to go with the singular units?