I do not expect the crowds to be as busy as some, but very busy. And probably not as busy as they will be when Diagon Alley opens.
My thinking is this:
-- Spring breaks are spread out all over the month of March and April. And nearly all Florida public schools have there spring break in March, well before Easter. So spring break should not drive the crowds up much as years past. Although Easter weekend may be rough.
-- Diagon Alley opens this summer. So if your going to go, why not wait a little bit longer and go when the new stuff is available. Especially, when it is only a handful of months away. I think some people who may have went, wait until later.
-- With the new FantasyLand at Disney open, it seems a lot of people may prefer Disney over Universal
I have searched the internet all over for information on Easter crowds at Universal. I saw very little in past years where crowds where ever unmanageable during this time (although it was very busy) and most people who went during this time really enjoyed themselves, especially those with Express pass. Seems express wait times were always under 15 minutes (mostly less) except for Despicable Me which can be around 30 minutes. Now Disney on the other hand, offered a lot of mixed reviews, and seems that crowds there were ridiculous at times.
I would be interested in hearing someones first hand experience of going during this time.