Can certain terrain features like Hills be marked as dominant terrain feature. In any of your unit occupies that feature it could give that unit a spotting bonus or +1 or in rarer cases +2 showing that it has a commanding field of view.
Additionally any indirect fire into that units field of view now benefits from an artillery bonus (depending on weapon type better rate of fire, better suppression or even in rare cases attack bonus).
This would make for a newer gameplay element where seizing a terrain feature could be a key focus of the battle.
Naturally dominant terrain features must be used sparingly so as not to a turn based version of Close Combat Series. But it could be imaginatively used in both urban and non-urban terrain. For instance a map of Stalingrad could feature Mamayev Kurgan and organically lead to fighting for it rather than placing a victory hex in it.