It'd be nice to have a real throttle in GVs and to be able to map it to the pedal (ie right hand toe brake).
I looked up the driving on a real T34. There are throttle, brake, and clutch pedals just like in a car. Ignoring the clutch, the throttle and brake could be mapped to the right and left pedal toe brakes. Steering is done by two levers to disconnect the clutch on the left or right track or, pulling further back, engage the brake for the respective track. I guess this kind of all or nothing steering is why tanks always seem to jerk when turning. This could be mapped to the stick, sort of. Or it could even be a keyboard mapping as it's an all or nothing affair.
I think this would make driving tanks more fun. It would also be nice if they could turn sharper, ie turn like you'd expect if one track is braked and the other powered.