Heights and their effect on the battlefield

[Charles the Modeller]

I’m working with some friends to produce a set of WWII war game rules. We’ve now drafted some rules for hills, heights and depressions that we think reflect the impact that height and height differentials have in battle and we’re seeking feedback on the approach.
You can see the detail of the rules here at www.allhellletloose.co.uk.
It would be great to understand what effects you think hills and heights should have both in and out of combat.