Players in my group like the grand scope of taking command of significant forces, and as I've said, are also fairly regular wargamers. So they have pretty much evolved past the small action point, although the core of the campaign remains individual level scenarios. The overall campaign arc will naturally lead to bigger and bigger actions as they progress to leading their various factions, so satisfying both elements is a bit of a juggling act. Hence looking for a wargame system that caters for individuals influencing teh battle.