Now when I say weakspot i mean parts on high level zombies and whatever bosses they add in the future that can be destroyed individually. Currently my only idea is on the upcoming gasser zombie who i assume can heal himself with his gas his gas bubbles which look like pus pockets can be destroyed when shot to eradicate his poison gas cloud making him easier to take down. as for any possible future bosses they should have some kind of big melee or ranged weapons such as giant hammer or blade arms made of bone or some kind of fleshy like spitters that shoot acid barf that be individually destroyed with bullets, something like that. I got influence for this idea from the system in doom eternal that they call "destructible demons" where demons like the aracnitron can have his plasma cannon blown off with gunshots. I know we already have limb destruction on zombies and animals but this idea would be a great expansion especially when bosses begin to show up.