i really would like that, at least if regular zombies gets dumber again.
well what i meant by that was compared to the zombies now. (even though their kinda smart) the feral would me much smarter.
if your wall was 4 blocks tall. while the normal zombies would go to your gate or door. the Feral would just Hop over it.
if their was a bunker under your base just made of stone from the ground that you uses a A tunnel to get to places. he would brow down their.
but TBH that sounds really hard to do (i don't work with AI so i don't know, sorry Faatal lol) so if i had to change the feral i would basically make him kinda like a Necromorth from Dead space (in a way)
say the Army had a Mini gun that had HP rounds and was trying to mow down the horde. while almost all the zombies would be dead. the feral would still keep coming. even if is chest looked like Swiss cheese and his arms were gone, he would just keep going. until you start to damage his head. there head would have tiers of breaking. (normal , cracked , Exposed, No head) and his brain would be glowing a Dark Red as a Marker to shoot.
the Lore is basically that "the Feral Wight had Extremely unstable strain of the infection due to a Radiation and Age, while feral zombies have a Unstable from of the infection due to the fact that they could run in the day and night. however overtime with age and a extreme dose Radiation they will turn into a feral wight. they feel no pain on almost everywhere on the body, unless you shoot the Harden skull due to the infection going up to the brain. The infection makes the Brain ignore any pain ,so the Brain is the only weakness. even if you chopped off its legs and arms it will still be alive." Plus a "Wight" is basically in the dictionary is "a spirit, ghost, or other supernatural being."
so basically it has the power of a super natural being.
Plus it would make nearly anyone crap their paints when a 7 foot tall mutant zombie that's nearly invisible zombie is looking at you like a Snickers bar . unless you got a Tier 3 melee weapon or a Good gun or bow. Run the other way!
Side note: no i haven't been drinking