About the brain being able to adapt better to new limbs then a whole new host, I'd think it would be the contrary. If you transplanted the brain of a new born, or shortly thereafter, and wire up the connection to the 'most likely spot' (over simplification yes) the brain would probably adapt to the incoming signals much better than creation of new pathways due to the transplanted wings. Then being young it has a greater ability for compensation, so the brain would change shape compared to that of a normal humans. Then again, this may also cause the lack of human like behaviors due to the morphing. a nice dream though.