Not 'Christmas crowded ' but DEFINITELY not empty either!lol
There were lines for the Peoplemover-it was not a "walk-on",so that is how I judge crowded.
We found Blizzard beach and Typhoon Lagoon to be VERY manageable if Water Parks are on your agenda.
Just a "heads up",since you have never been in July,your week is probably the "Peak Week" in July for The 15s,so,if you have never seen them,get ready to see hundreds of 15 year old South American girls with matching shirts and backpacks marching behind a leader holding up a flag on a stick!
Not something you see every day!lol