Yeah, the new zombie hording is insane. Though, if you create a cactus fence around you, it's fun to watch them pushing each other into it. Caving has become a real hazard though, even at easy or normal levels. I almost wish they'd scaled the mob buffs (zombies and skeletons) to game difficulty.
Still, the horses, hay, carpets and colored clay have made things very interesting in terms of building up existing bases.