Love the way that base looks. I may just have Natura in. It's tempting, I mean I want faster worldgen, but I also love the redwoods to an extent. Strange that they only gen so far away from each other. Though the Nitro Creepers, urgh. I could always just breed an army of cats, get a bunch of safari pods, and drop them in the Nether, and make a fence....
Hrm, now that I think of it, it also makes me wish Spiders were breedable. Rotten Flesh could be a great use to breed them, maybe even Melon (Spiders LOVE melon irl), okay now I've gotta type up a suggestion on Minecraft Forums
The blood bit is moderately creepy, but makes sense.
My big worry now is that I have Treecapitator installed, and it'd make a tree base a total pain to work with....