JMM,

1. Espionage - yes definitely, this falls under CIA's HUMINT mandate. (google "national clandestine service" for more).
2. Disinformation - not sure what you mean here. Psyops? If so, I thinks that's spread around a bit. Not really sure.
3. CIA still does covert action stuff. It nests nicely with clandestine HUMINT.
4. CI is still distributed among the various agencies. There isn't yet a centralized CI organization.

You may find this CRS report of value: