Question is why did they give stug e those shells? Was it really necessary? I think the only thing those shells did was take some authenticity out of the game... :/
We need to keep things as realistic as possible while making the game fun and balanced, I can't emphasize this enough. I think one of the reasons why people play this game instead of other strategy games is because it looks (kinda) realistic and historical, it is what makes coh COH!
Actually the Stug -E is very similar to Leig gun so the current implementation of slow moving projectile with a ballistic trajectory is more authentic.