Just sailed on the Magic October 25 - November 1. We had rough seas and had to change ports of call. Our Thursday changed from a sea day to a stop at Key West. Friday was October 31.
DCL trick or treat got rescheduled so that people were rushing to get back to the ship in time for kids to dress. They started the t-o-t'ing early; the lines were long (lots of kids on this cruise - and lots of
Castaway Club members - 1500+, so people were expecting a great Disney Halloween experience).
Overall, I have heard very few positive things about this year's Halloween.
I did not participate, nor did the teenagers in my family. There were some great adult costumes which were judged after dinner in the atrium. Semi-formal night and Halloween costumes ended up on the same night.
But Friday was CC, and people wouldn't have liked rushing in from there, either, I don't suppose.
On the flip side, our DIS group had a great Halloween (from all reports), where kids followed clues to find the next station (not just a map) and got a Halloween bag filled with candy at the end of the hunt. Adults volunteered at the clue stations and as escorts. This was on a sea day and kids didn't wear costumes that day.