HE spam has been an issue for a while. Many people have wondered why a shell wipes their squad out, even when behind two or three walls. It’s down to the code, and how HE works and its splash damage.
I’m not a fan of nerfing anything, but HE damage seems way OP, even today.
Again, it’s just an opinion, I’m sure many tankers will disagree with it. 
I play a bit of everything. And I agree “in a way”…That is it is powerful now and it should be…but the way it interacts and can be used needs to be governed…
so instead of making it weak through nerfing, Id rather put the responsability in the players hands…Do you use it powerfully, or willingly self inflict consequences for flippant use.
Keep in mind this is only one change. In return for HE FF I would remove the Horsepower and traction restrictions from vehicles and the MG over heat as compensation.I think this needs to be done anyway