+1 RocketDog
The trees in the London streets look OK because these are (IRL) mostly introduced limes and planes which do have a vivid pale/mid tone green leaf.
South of England forest and copse is oak, elm, hormbeam, beech etc.
If you compare the colour of an actual RL mature leaf from these trees to a lime or plane tree leaf they are much darker than the leaves of the immigrant trees (I know, ironic
) and much darker than grass.
Those who are defending the colour choice seem to want to have it both ways: on the one wing they say that it is all subjective, so there is no right answer. On the other wing, they say that Oleg is jolly clever and so could not have got this wrong. Both these arguments cannot be right.
In this case he (or whoever) has made a mistake, easily fixable, with an options slider for tree albedo!