I quite agree. They should take all their strengths from New Vegas and the first two games, and blend them together. I particularly can't stand and utterly hate the bright blue skies in later entries like 4, becuase it makes it look a LOT less like a proper post-apocalypse, and more like some stupid stroll through Disneyland! I hope with all my heart Obsidian gets it right, not only by taking notes from the New Vegas and the first two games, but by also paying close attention to their consumers comment sections, such as this one. Getting back to the sky in a Fallout game, it should look nice and dead, and foreboding. Perhaps a nice and sickly radioactive green, or cloudy and gray. What do you think?