We were there for 2 days during spring break, not sure what crowd level # was, but it was busy.
The issues we had were at VC and Hulk. Both had ride issues while we were in line. I was just checking my old texts, got in VC in express line 9:35, off ride about 10:45 (noted time after lockers/exiting, etc.) so 1 hour 10 mins, and the posted wait time was 140 mins regular line, so right around half. Hulk EP was about 35 mins, but I don't have regular line posted time. I know VC was down for a bit, while we were in line, in the stables....it was so hot!
Hogwarts express, walked on, barely a wait at Spiderman, Jurassic Park river Adv, etc. I don't recall issues anywhere else,, I think
BUT....
what I would totally recommend is eating early, at an off time, like 10:30 or 11, if doing QS, or making reservations at a sit-down. Trying to find food around lunchtime was complete insanity. My mobile app was not working, lines were nuts, etc. Hogsmeade will be crazy crowded. Diagon too. The Florians line not only went outside and around the store, but turned off again, like a switchback.....
So it'll be crowded, but do-able, just know ahead of time, and plan around. EP was a blessing!!!
Have a fabulous trip. I was supposed to be there President's day weekend....but at Aventura, but plans fell through. Carnival time is always so much fun! Let the Good Times Roll!!!