I started some experimental runs.
Hell, there are so many changes since I played it the last time.
In the past most of the zombies I killed were normal “Z’s” followed by zombie childs and dogs. But now it seems normal Z’s are rarities. The most zombies I met were “Tough Zombies”. In some houses I met three.
(You can still reduce the density of zombies on the map, right?)
I also met an Zombie wrestler in the shelter. Never heard of it, I lured him up because the NPC had a good pistol but he hits and hits about five or six times without heavily injuring him . So the game was over really fast. It seems to me he’s tougher than the old Jabberwock. If it still exists, that is.
I was astonished because of the percantage of iron and vitamins in the food. I don’t hope I need 100 % of every vitamin a day. I don’t want to become a nutritionist. 
So far I did not survive a single day. (Ah, good old times, when I survived more than a year and killed more than 1000 zombies… )
I’m quiet sure I a need a lot more testing of the new game mechanic.