The mud stuff
does look fun.
And I'm all for another wood type, especially since it's more of a nicer red color than the crimson shroom log things. Not sure I'll have much use for the allay mob, but the warden and frogs (& tadpoles!) should add a bit more danger and ambiance.
Is this a world trim before upgrading? I'm pretty sure the 'biome blending' works between all updates now, so we could trim and still get our nice borders, I think. There's a few areas I've built on since then – I'll pull up that old trim map and mark them down asap.