As a “veteran” tanker player one of the things I’m missing the most when driving a tank in the commander position is the ability to see around without having to move the turret. In some tanks like the Sherman M4A1 it was not possible since they had very limited visibility, but some others like the M4A3E2 “Jumbo” had these glasses in the hatch as well as some other openings to be able to do have a look outside. Germany and other nations used similar resources as well, and many little openings can be seen in most of the tanks.
I think it would be great to include the real visibility of these tanks in the game, it would encourage players to use the commander seat instead of the gunner most of the time.