The copilot's unenviable task is probably to land the beast, because the pilot doesn't have much visibility to the front and down. Not that the copilot has much to the front either, but at least to the sides... Alternatively, it could be that the pilot would be up in the cockpit only during takeoffs and landings and cruise and potential combat (when visibility would not be an issue) would be handled from the comfy and roomy main cabin.
Whatever the purpose, the shape of that behemoth would certainly lend itself more to a passenger airliner than a bomber. Can't be envy to the nose gunner who will have his legs shot off through the panorama windows.