Disney has been way too focused on Princesses for too long (which are geared towards little girls visiting theme parks). They're treating what is supposed to be a LARP experience as if it's on the same playing field as afternoon tea at the GF or dinner at 1900 Park Fare, when LARPing is in a completely different league. (For the record, I'm not knocking the afternoon tea or dinner - I love dinner at 1900.) Yes, there's acting involved for the CMs that make those experiences happen, but what makes those fun is that it's a "show" where the characters pretend they are unaware that the guests are theme park visitors. The guests aren't part of the story...they're on the outside, looking in. That's not what LARPing is...it's not even close. I think it's safe to say that Disney didn't bring on a single person who is an expert in planning LARP experiences, and that they thought the people who plan the in-park character activities would be able to handle this.
As far as the marketing goes...they're marketing it like they market the theme parks. Commercials showing what everything looks like with an appearance by a character now and then...but there has to be some kind of verbiage, so they threw in a couple of guys talking about much work went into it (no little girl in a princess dress running down the castle stairs or toddler running to hug Mickey). But again...people don't expect to be "part of the story" when they visit MK. I know many of us love behind-the-scenes specials, but commercials and previews of a LARP are supposed to get us excited to actually participate...not feel like a pre-teen making a YouTube video explaining how many hours they spent creating a Lego project and choosing just the right colors. Everything they've released so far indicates that they're looking at the Halcyon the same way they look at Cinderella's Castle or the Millennium Falcon...and that should send red flags up all over the place. And for the love of all things good, Disney needs to stop trying to market things in the same way "influencers" do.
I really think this is the moment that Disney's executive hubris is going to bite them where it hurts. HARD.