Yeah, I wondered all the same things.
I'm hoping to replace the halloween tarantula with a little robot arachnos spiderling, because <-- Arachnophobe. Or heck, even just anything, I just want it gone.
I think the model I want to replace shares animations with one I'd end up with. The tarantula isn't targetable, so anchors and hitboxes shouldn't matter. I'm fine if animations and textures look janky.