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Then I'm not sure, if they had similar cones in those days (maybe wooden?) and on other hand I'd love to see there more hay bales (in front of crowds).
I've seen nicer booth/boat trucks.
The 1942 version is bit better, but year is wrong, in those days they had other things to do on airports all around the world than demolishing runways and racing there, 1945-50 would fit better (time of abandoning airbases after WWII).
The lake could look better with bit higher water level, the high grassy bank is not very nice now. And all the back part would need some hmap (like Matty said) or few buildings or trees to make it more plastic, it's too much open everywhere. I remember one rule of Japanese gardening, how to make lakes with beautiful views - ''When you walk around, there must be no place, from where the whole surface of the lake would be visible at one time.'' In GR it's same, put some trees or buildings to cover view in some parts on the gravel or tarmac roads in top (not much, just few %) and it will be much better. Same with the houses/path in bottom.