RPG Splash Damage Range

I understand the argument that RPGs (and other explosives) can't have too much splash range because then they will be spammed constantly; but where the RPG is at is not the right place right now. It should be effective for at least the width of the back of an MBT.

For evidence, I submit this video where I have RPGs literally blowing up right next to (and in one case, somehow through) an engineer repairing a Tank; it doesn't even phase him. This is bad mechanics and completely immersion breaking.