Thanks, pzgndr, that's interesting.
I wouldn't particularly want the AI (or human players for that matter) to be forced into essentially following a scripted plan!
What would be nice, in an entirely re-vamped EiA, or more accurately in a new game based on the EiA idea, would be for the major nation states to have asymmetric objectives that pertained to the actual historical situation. Then players, AI or human, would be influenced to seek those objectives but not forced to do so.
For instance, France would be seeking to extend its frontier eastwards into specific regions, and a 'major victory' would be to actually annex the Low Countries entirely. Language would be important too. Coalescing all francophone regions into one greater France should be an objective.