after fighting some feral wights. and i don't really understand whats so special about in terms of special zombies. mostly ability wise cuz their just strong and they run in the day. Cops can spit and suicide bomb you, Screamers summon zombies , Spiders leaps at you etc.
but im not going to complain about the poor feral without giving a solution or idea.
1: Near invulnerably: basically the only way to kill them is a Head shot but their head is harden. if you blow one up , Burn , Cut off all its arms and legs??? it will still keep coming! so you would have to aim for the head and it will slowly come apart until his brain shows then. destroy it.
2: Power up!: higher jump , ability to leap at you, more HP and basically turn him into a super zombie.
and 3: Intelligent: it smarter then most zombies. trys to find different paths, trys to dough attacks. and gives a boost to zombies, sense they see it as a "leader"
but thats just My Opinion. some people may find them hard to kill some may not.