Use a trap door instead. Zombies can't break that. Or if all the zombies want to crowd one spot each day, put a kill device there like a crush piston or just build near you house a pit that when you use a bucket of water is washes them all down into it. Then when the sun kills them you get all the rotten meat free. And the zombies that spawned with helms you can kill for the chance at an armor drop because they'll be left.
If your house isn't made with wood/wool just drop a lava bucket on them.
I have to say, I like the new spawning system for the zombies. Personally, unless I'm stuck in a tight corner I find it nearly impossible to die no matter how many there are, and there is something about smashing their unthinking skulls in over and over that appeals deeply to me.
That being said, I will agree that the spawn rates should be scaled based on the difficulty setting. No need to punish the casual gamer just because most others enjoy a bit more of a challenge.
On an entirely unrelated note, zombies should totally be able to break down wooden doors on Normal instead of just on Hard.
Not sure if they really added a "hording" AI as much as they just ramped up their detection range to some obscene level.
Would have been more interesting if they had super rare spawn zombies with insane aggro range and as they mad their way to you other zombies would follow them. Which would have mad for an occasional zombie horde, not just every generic zombie that spawns is going to make a beeline for you.
I think my problem with most of these updates is the base ideas are good I'd even venture to say great.... but they are just being implemented so ham-fistedly.
The Meaning of Life, the Universe, and Everything.
I like that they made the night more feared, but endless amounts of zombies due to player damage. A simple task of killing a zombie near your house to get in can turn into a disaster. But I personally fight good and especially that they are slow. But the first nights will be a bit hard for new players, but peaceful is there.