Good choices!
Personally, I'd now like to see(sorry the customers are never satisfied..

) now a network of road systems implemented in the game, which IMO is probably the final touch of immersion that can be done to the terrain.
The coolest thing ever, is seeing GVs trying to make their way to enemy town by following roads that are paved through the forest! Incredible feeling!
If there were paved roads everywhere on the map, and it proved some sort of advantage (such as no shaking, or maybe 3~5mph speed advantage in moving..), people would use it.