going to get zeds that are big/small enough to have real height filtering abilities is if TFP actually makes some tinier adults, implements new walk types (zeds doing the limbo .... zeds doing the worm?

), or makes some new mechanics where they can squeeze through a single block (like put their arms in and pull themselves through, etc). Maybe another option is more animals that are small but IMHOthat doesn’t have the same feel as zeds trying to get you at all different angles.
also: I don’t know how you make zeds only spawn outside. I am taking this to mean: it doesn’t matter when you’re defending your base, as they spawn outside of it. But during normal looting POI gameplay it’s kinda cheesy when zeds get trapped in doorways. Then again, they may not be super smart. A good “fall down if you hit your head and crawl a block forward” zed mechanic might be cool. I think it would also be cool if they could pile up many blocks high, or crawl through 1 block holes that are not ground level, as long as they are not too wide (like maybe skinny adult zeds could do a shimmy). I do agree about the crawlers: I think the crawlers should be able to crawl through 1 block high.