This IS a great game, eh?
Simple to learn, but lots of depth for us "GG Junkies" to sink our teeth into :)
I do believe the AI can't handle new units, this would have to be a thought for GGWaW2, lol! More more more!
Also there's been talk of unit experience, but that's currently un-programmable too. (again so I believe, I'm not a programmer by any means)
If you're a pro, revalry, you could design now Icons for the units :) Like Pz Mk III for early German tanks, & etc.
No Will but Thy Will
No Law but the Laws You make