If it truly means staggered arrival/start times for the groups then I wonder if they might flip the order? I know in previous years, the faster folks went first to not trip over us slowpokes. But now...maybe they'd start the slower ones first?
That's hard to do. I have done the former Vancouver Rock and Roll Half when they put those of us assigned to the last corral up before the elites. We started half an hour before the elites (with NO fanfair whatsoever).
IT was all great for half an hour. Then the trucks drove up and told us all to get to the side. 5 minutes later the elites blasted through. It was AMAZING. The elites had been behind us in the corrals; they knew what was going on, and we didn't bother them.
It was the rest of the runners that had issues with us. Some of the issues were purely their fault for not reading all of the information pre-race. The info wasn't buried, they could have easily seen it. Many of them were total jerks, even to those of us hugging the right side of the course (right side for walkers was part of the rules of that race).
And some of the issues were on the slower people with no race etiquette. Since rundisney races, and IMO especially Princess, struggle with race etiquette, this could result in NOT good things. They would have to have lots of volunteers out for the slower people like me, to make sure we didn't clump up, get lazy in our intervals or walking or slow running, and cause a bottleneck.
again, just my assumption, but I was thinking the opposite: Maybe they expect this field to be smaller so it's a better opportunity to try something new.
Maybe.
As @flav said, I'll just need to go with the race flow and enjoy the slow pace.
Although I despise the group for the most part, there is a FB group of people who start "dead last" every year to "prove" that anyone can have a good race even without a good start position. They do it by having atrocious race etiquette, putting slower people in danger from flailing elbows (the men and taller women, at least), and having shirts toting up "kills" (aka people they pass), but they do it.
Anyway, you can be that person, just without the flailing elbows and anger at us slower people.

Get to your corral or starting area so you're starting among the first to go, and you'll be golden.