I remember when they added scatter to the stuka and it made it twice as OP.
The best rework would for it to launch its rocket in a circle similar to the firestorm barrage. Although I don't know how you'd be able to influence the rocket placement because theirs so few. So unless the AoE was buffed a good margin and the OHK radius lowered along with damage, I don't see how the stuka could be changed from the way it is.
The rocket AoE currently evaporating tanks is just the cherry on top.
That is not an accurate description. The weapon has zero penetration so it will do 40 damage on a direct hit with hitboxes but has high AOE penetration and will do lots of damage from AOE to hitboxes.
This is oversight and it should be fixed.
Personally I would rather see incendiary barrage/smoke barrage as standard and HE barrage with tech (either upgrade or buidling)