Unless I am completely off base, I would expect some really nice things from this.
First off, assuming oblique hits on gvs were not modled, then whenever you hit a panzer on it's side armor, REGARDLESS OF THE ANGLE AT WHICH THE SHELL IMPACTED ON THE ARMOR, your shell would have the penetration caracteristics of a 90 degree (to armor) impact on the side armor. Example: throw a tennis ball at a wall and watch what happens. If the ball hits the wall and bounces straight back at you, you hit it at 90 degrees. However, if the ball bounces back at an angle, you hit the wall at an oblique angle (not straight on).
Now, in the real world, you are hardly ever going to get a true 90 degree impact on the armor, and this has an effect on the penetration caracteristics of the shell. Basically, if you the side of a panzer at an oblique angle of, say 10 degrees, then your shell would have to penetrate more armor than if you had hit it straight on, the same way it has to penetrate more armor when you hit sloped armor.