I like the new food items we have. Being from Maryland, eating more mutated crab is good :)
I'll lend my skills creating new models, like the Yao Guai pelt. I don't think very many unique items will need to be provided and fewer is better in this case. It's not often that you see the world-model of these things anyway and many of them are shared.
A priority should be adding at least a few poison recipes which make use of non NV-specific components. Every one of the available poison recipes calls for either Cazadore or Bark scorpion poison. My suggestion would be to add an industrial/chemical/radiological poison which isn't made from animal products. Or if one is, make it use something from an animal that you can find only or predominantly in DC, namely the Yao Guai.
So, powdered Yao Guai claws?
It's unfortunate that this seems to be the only creature unique to the Capital Wasteland (except for the Mirelurk?). Which is why it may be worth considering modifying a few creatures (like the mole rat or the centaur) to drop blood or other things which could be used in new poison recipes.