You forgot a fourth option, although you mentioned this word earlier.
Intent. Although I doubt it was necessarily intended in the initial design, they may intend for it to stay that way. Don't know. I only play a psychic on TV.
Now here's a thought. What IS the intent of MyMagic+? Why are they sinking a couple billion dollars into it? Customer experience? That's a side effect. I don't think anyone would argue against spending that sort of money expanding the parks wouldn't have greatly improved the customer experience.
No, it's about data. Data is money these days. And they will be able to get all sorts of data. What you buy, where you go, how much time you spend at the resorts vs. the parks, etc. etc. They can focus cast members at attractions that have higher number of FP+ selections reserved in advance as they will be needed. They will have REAL data to know what days will be busier at which parks. All to save money by efficiency.
You know how they gather more data? Get more people to use it.
So although the 60 day advantage may currently be a perk to entice guests to stay on site, Disney may not care as much that they didn't use the room or cancel the reservation after getting the bands and FP+, because they are still
using them.
The resorts don't really care about FP+ - it doesn't affect them.
The parks don't really care about the rooms - they want people using their MagicBands.
I just think it's funny that they are getting people to spend $13 (or more for the limited edition ones) or be willing to pay for a room just for the "perk" of being a walking data point.