It's not like the Stuka hit's a line or anything, that would mean it would be easy to predict the path of the barrage based on the way you have your units lined up.
And the Stuka is totally unpredictable, which is why it's the loudest most obvious artillery in the game.
*WOOSH WOOSH WOOSH WOOSH* Mmmm must be nothing.
Sorry to tell you but good players will fire it in the retreating path not directly at the units if the enemy they are facing is good enough to move in time (I'm aware this wont effect you due to your skill level but it is in fact still true). I'm sure anyone with an ounce of skill (and lack of bias) will agree regardless of what your misguided views are.
Also in B4 you have no evidence / argument bla bla personal attacks and allied indirect fire is OP. Oh and before you ask, my evidence is playing at a high skill level (again something you lack the experience of).