Not sure if this is a bug or a balance issue, so posting it here.
The pen (or target tables?) seems kinda broken for the SE firefly, I just had a game where a friend was bouncing firefly shots off the rear of a churchill MKVII multiple times (the churchill was already immobilized).
The SE shermans are also surpsingly tanky against guns smaller than 76mm/17pdr, at least on CW. I usually play US against PE so I hadn't seen the matchup before, but the guns on the churchills don't do anything to the SE firefly. Same issue with the cromwell. It wasn't gamebreaking, as I'm sure a 17pdr would do the job fine, but it might be worth looking at, as it doesn't seem intentional considering that similar Axis guns generally pen without issue. I did not expect that engagement to be a slow boxing match between those tanks, both should have had the pen to kill eachother.