I saw your campaign thread and thought I'd chime in as the club I chair are running a 40k-style campaign. I thought perhaps what we're doing could provide you some food for thought.
Essentially, we're running our forces as if its a real-world military (minus a few bits like logistics) but the armies are all 40k. First time round the Umpire made a map and we were all given a HQ had to expand from there, engaging not just each other but also Umpire ran "NPC" forces. This time around, I drew up a map with round terrain and borders and we all started with a "country". All our maps use the Planetary Empire tiles for ease.
What we do is largely up to us; we can make/break alliances, fight one turn of a battle then tactically run away, Deathstrike someone at the other end of the board for giggles etc. The key thing people haven't quite got their head around yet though is the use of intelligence; sure go charging blindly into the abyss but the chances are you wont be very good. I go nuts spying on the enemy to the point where I'm spending most of income on intelligence.
The thing with our campaigns though is that you need an Umpire to whom you submit all your orders and purchases to each turn etc.
I've linked some of the rules and the map we're currently using for you to have a look over (please let me know if the dropbox link doesn't work for people...first time I've used it):https://www.dropbox.com/sh/843jmi4drmy2 ... W7W_a?dl=0
RAF Wyton Wargmes Club WH40k Campaign 1 = the rules we used in the first campaign
RAF Wyton Wargmes Club WH40k Campaign 2_version 2 = the rules we are currently using
campaign2_turn 1 purchases = the full list of what I bought to field in the campaign
campaign2_turn 1 orders = every battlegroup needs an order before you want it to do something... these can be as detailed as you like, the greater the detail the greater the potential benefit for you is however...
campaign2_turn 1_MW = the campaign map
campaign2_Matt_Turn 1 Report = This is the sort of thing the Umpire will hand the player at the end of the turn ready for the next one
Spreadsheet_excel = Basically my entire army plus orders and coordination for our current campaign... I've kind taken it to the extreme and it probably doesn't need to be this detailed
Tau propaganda Flier = something I made for the first campaign to "entice" the local NPC forces to join me. Got myself a full IG platoon that way.
Anyway, like I said, food for thought hopefully.
When I tried seeing things your way I got a headache.