I would rather say it was a great improvement for any thank with Commanders cupola, and a nerf for all tanks that don’t have it. And that is the way it should be. If they remove map or indicators on maps for tanks that did not have radio operator you get another balancing factor.
But now we are mixing apples and oranges.
Tanks are not compared by their side armor but by their front armor. Side armor helps, but it is not decisive.
Panther is a frontal beast, but is a kitten from side.
Can Pz4 kill a Jumbo from the front? Yes it can if it hits that exact pixel.
Can Jumbo kill a Pz4 from front at ranges we have in game? Do I need to answer?
And don’t get me wrong, Jumbo doesn’t need to be nerfed. Sherman with a better gun and less armor should replace it. Easy Eight maybe?