IMO, I don't think it is really required. There are is no setup timer for turretless stuff, thus you can always quickly reface to the enemy.
I would be opposed to this on account that it would make my UI too cluttered every time I have more than 4 Stug-E/G's on the field
Stop spamming then you scrub!
I figured it's still be nice to micro stopping right at the edge of the cone of fire to shoot accurately as soon as possible, but visual noise is definitely a consideration I didn't think about though, especially since you'll a lot more likely to move numerous TDs at once compared to ATGs or HMGs. The tiny cones would also probably be harder to pick out easier compared to the weapon teams.