Thank goodness for ridding us of straggler trees!
I like the ideas of using grooves as a terrain for war. I think decreased movement, attack range, and vision make sense. I also think there should be modifiers for ambush because surprise should positively effect your battles. I'd envision a greater ambush modifier if enemy troops entered the forest because troops garrisoned there should have experience with the terrain. I would envision a smaller and short duration ambush modifier if your troops ran out of the forest. Also, I was wondering what people thought about garrisoning of some units and lumbering of some other units in the same area? I feel like those garrisoned units should not receive any ambush bonus.
I also wonder if more modifiers could be implemented with the climate. E.g. A player could invest in sturdy boots and coats for battles in winter. Negative modifier for archers to aim in rain with wet fletchings or at night.
Lastly, I loved Stronghold fires and was wondering what Justus thought about the ability to torch buildings in DE with the side effect of giving a "vengeance" morale boost to the enemy. Capturing and deleting felt silly after a while in the normal game.