Very fun game. I think it's better that Reinforcement and Repairs is done at the map as well, so I can see where radar station and airfield is in (well, not very familiar with Britain's airfields) at planning. For example, list those info in a popup UI like in SGS game. Using the left mouse button for both dragging the map and selecting units—then also setting targets—feels a bit prone to accidental clicks. Maybe some of these actions can be moved to the right mouse button? Also, showing where a friendly unit is headed would help avoid confusion. Showing statistics of losses for both sides may also be helpful for immersion, although keeping it abstract has its own benefits.