Simultaneous Campaign Turns
While this is probably too late of a suggestion for WARNO that already has an Army General Campaign system, I think AG campaigns in Eugen games would really benefit from having simultaneous turns. Both players (or the AI) would order their units around on the map, and then upon resolution, units would move.
Two units being told to move to the same point from afar or attack each other would lead to an engagement battle.
Two units close to each other that were both ordered to attack each other would lead to a close engagement like in Steel Division.
One unit attack another that was holding its ground would lead to a breakthrough battle.
Battalions available (other than the initial two units) would be ones that are in the area of the battle, similarly to how it works now
Air missions would be ordered out beforehand so you could send out a SEAD wing, a Fighter wing, and a bomber wing which could negate AA defenses without wasting your CAS or fighters.
I especially think this would be fun in PVP campaigns where these simultaneous turns would add an interesting strategic element to gameplay where players need to consider opponents moves when making their own instead of reacting to what their opponent had done during their last turn.