ah, but an army camp is different than a hero. the army camp has to be usable, because what if your camps were full and you wanted to upgrade one? And I have already gone over the Clan Castle...
You are right. letting heroes attack while being upgraded wouldn't be
too drastic of a change. But it would be a big one, and it wouldn't make sense. And with the war attacks, your shield doesn't break because it isn't a "real" base. its in a fake landscape, and can only be accessed through war attacks. Think of it like this. Normal enemy bases are in ne direction, and your shield is between you and them. The clan war is in the other direction. I sketched a quick drawing of this example in one note. hope this shows up:
https://docs.google.com/document/d/1...it?usp=sharing