my problem with fast zombie-esque villains is that it misses the point of why zombies should be terrifying. Mainly that there are so goddam many of them it doesn’t matter, eventually they’re going to get you and you’re going to be ripped apart, and that awful fate is only one mistake away. A mistake most likely caused by the wildcard or heartbroken. There almost has to be that balance, you can feasible construct some sort of fortress and establish the semblance of a normal life, long enough that someone gets complacent. Its that building of hope that illusory that’s so important.