Assault not ratio based?

[pixelgeek]

Daniel, I suspect you are thinking of Assault Combat as a mêlée. I find it more practical to think of it as mini SL/ASL fight, on a map 5-6 hexes across.

This is the perfect way to view it.

Also don't forget that the assaulted hex has been softened up in PG for several turns. 

PG also plays at a larger scale so the more granular effects that you see in ASL aren't modelled.