Nigel,

All you can do is post on the forums and hope CA picks up on it. However, this idea of offline multiplayer campaign has been requested for over 3 years now. So, I don't think it stands much of a chance of making it into RTW even thought it seems like it would be relatively simple to implement.

I mean we can't even have a feature like preset armies. I can save a preset army in custom battle, but I can't use that in multiplayer. You have to pick the army unit by unit every time you enter a battle even if it's exactly the same as the army you just used for the last battle. Maybe there is concern about possible cheating using such a feature, but it seems to me doing some checks on the units being input to the battle would prevent cheating.