I think it represents, correctly, the notion that there are crewmen looking in all directions at all times. Obviously, this is more the case with the B17 than so a Boston, bt the concpt is still legit IMO.
However, I would like to see some sort of revision that the views be based on each individual plane and not the class of plane. For instance, why does the Boston and A20 get the F3 mode when the IL-2, 110, and 410 do not? The pilot and crewmember are in the SAME positions. Oh, I fully understand not allowing the IL-2 to have the F3 mode, I fully support that. The armor alone restricts the view, but that plane, or that class (1 pilot, 1 dorsal rear facing crewman), is entirely different monster than the heavy bomber with multiple crewman looking in multiple directions.
Hopefully, HTC can figure out how to limit the F3 views a bit more. Again, this "all or none" categorizing is a bit much, imo.