I'd like to see some checkbox options to include things like troops routing, spectating after you fall, forced-dismount ala village defense in single player.
Maybe even sliders for Time of day and weather and, if Routing were added, include a silder for both each sides starting morale.
Its definitely cool as is, of course, but I'd love to be able to do something fun like use it as a combat resolver for a make-shift board game, or set up crazy and interesting battle scenarios, that require tremendous effort to set up in single player.