One of the things I have always found lacking in the IL2 maps (I don't have CoD yet, waiting for new computer) is a natural placement of buildings. The auto-populated IL2 towns have the houses all lined up neatly. In real life, buildings follow inclines and roads, not the adjacent building. Houses are built together, forming continous structures. Here's a real life shot of 1940's small industry from West Bromwitch, and an attempt at replicating the look in FMB, using as few different objects as possible (large number of texture maps swamps the CPU):
This kind of thing takes an insane amount of time. This is where I think the community can really be of help to the developers.