After the season 2 update, first-person tank aiming is extremely slow. If I adjust the sensitivity it makes 3rd person too fast or 1st person too slow, making it difficult to control tanks or ground vehicles. The only way to "fix it" for the time being is to switching betwen two different DPI profiles for 3rd and 1st person.
Easy fix, please add dedicated sensitivity sliders for 3rd and 1st person for each vehicle. In the meantime, revert the changes made in season 2 until there is a fix or leave it as it was in season 1 which worked perfectly.