Vi doesnt really loses much jungle pressure early because: she has fast clear times, she gets a lot of inherent damage on her kit alone, and earlygame she can gank effectibly without even buying combat stats.
Combine that with a couple of strong earlygame champions and you have a game where Vi can camp a lane or two while cleaning the jungle really fast.
And for Nocturne... Lee Sin!? NUNU!? There you lost 100% credibility because Nocturne shits on them both. Nunu tries to iceball Noc? Spellshielded and thanks for the AS buff. Same with Lee Sin's Q or W bye Lee Sin damage. Pantheon? SS the stun, counter with QE and kill him while he has to stand there doing Heartseeker, probably. With Vi simply SS the Q and she loses a lot of damage in the trade.
In fact, Notcurne shits on basically everyone that depends on one spell for engage, and gets destroyed by more AA focused Junglers.