Children of the Night of the Living Dead Go Mad in Dorset

Well, the party managed to survive its first encounter with a roving band of zombies, and with only one near-death experience. They learned two things:

1. Zombies in 5e are MUCH SCARIER than they used to be, and
2. Critters that stop to munch on you when you go down instead of moving on to another (moving) target are MUCH SCARIER than intelligent, tactically-savvy critters.

Having waded through years of game "development" in which player-characters have steadily become more and more unstoppably invulnerable superheroes, able to wade through oceans of mook-blood with impunity, it's rather refreshing to have them have to think twice about whether they should fight or run.