I think that is a great idea Bellum, positioning on a strategic rather than tactical scale was crucial in the ETW period, if you don't pick the right battlefield, you'll end up paying like the Jacobites at Culloden.

This was also true in medieval times, look at the boggy ground at Bannockburn ruining the English cavalry charge etc.

Would add a whole new dimension to TW games, I really hope CA consider this idea.