I have an idea. If the hotel fails after some time, Disney can change it to become "a hotel inside Hollywood Studios." The cabins will still be rented out, but at a lower rate (same as GF) and without meals. Instead, the dining room will be open to reservations to the general public, like other hotel restaurants. The guests can still be given a "story" to do LARP. The themed buses will run continuously throughout the day, taking people to and from DHS.
The "Halcyon" will become the newest attraction at DHS. People will wait in line to board the themed buses to get there and back, similar to that train in AK where you board to get to this science station building. People who are staying at the hotel will have priority boarding. Once people get to the hotel, they can try out the lightsaber training and bridge control, pay to eat and drink at the restaurant or bar, listening to the singer, and so on. They can have a character inside the hotel to take pictures. The cabins will be closed off with a glass door so that only cabin guests can go in and out. There can be also a small area closed off as the hotel lobby, for hotel guests only. When they are done, they can board the themed bus back.
Being that the hotel is "inside" DHS, it will not provide hotel transportation to all other theme parks. They will uber or take the DHS bus transportation to other parks. Guests there will be given free daily LL pass to RotR and Falcon rides, a perk that will cost Disney nothing.
That way the hotel will be utilized fully and help increase DHS admission income, instead of going to waste.