Yeah for me shambling T-Virus zombies who walk slowly and just want to eat your brains isn't threatening anymore.
Even the Crimson from Remake aren't that threatening anymore or ODZ with Forrest strapped with grenades.
C-Virus bloodshot are more threatening then Crimsons and there's groups of them. C-Virus zombies wielding all sort of weapons and can run, jump, side step are more threatening to fight against. Civilians don't even have a chance against them.