For sure there are a lots of improvements that could be done to have a even richer terrain that can be harnessed for strategic purposes. We need intermediates wood densities that would alter units behavior and line of sights more than the present one. And heavy woods should allow us to hide corps behind (unless altitude allows to see them). Also rivers, fences, walls etc etc. It will come with time, but JMM cannot do everything at the same time. Let's be patient