I think a medical center would also be nice to have. I hope to make an aircraft carrier battlegroup as a starting point / base for my future missions and to have it be a plain old runway is a shame. An aircraft carrier should feel like a mobile HQ, even like a city. It should be a nerve center for an entire army. It should always feel alive and kicking and I think the things I mentioned would definitely help that. Anyway, I'm sure you'll do an amazing job :)