That depends on your interpretation on what class of Zombie we are talking about. Are we talking The Walking Dead TV series kind, where all they do is walk and have seemingly no intellect.
Or are we talking World War Z kind that can vault and run and tumble and are very fast.
I mean your view on what you think a zombie should be is already broken by how they behave in game, with ferals and the blood moon making them able to detect you, hints at some intelligence.
AND that the blood moon night is designed to challenge players with base building, meaning its supposed to be challenging.