I'd prefer FP just because otherwise it is too hard to plan. With the current system I don't know if I can do HS in one day, or need to budget for two days (or hoppers--which add up for our group of 5) because of the boarding pass lottery. I also can't plan a nice resort ADR in the evening without being super worried about making it back for my 2 hour window.
I don't think FP would be gone at 67+ days--even FOP is available quite a bit earlier, especially at peak times. I also don't like that i have to wrestle with glitchy
MDE in a time-sensitive way on my old phone for the new system--at least FP can be booked at my computer.
Standby only worked will for MFSR due to the high capacity and the fact that it was "one and done" for a lot of people. Standby only for ROTR would be a disaster in my view.
The last two options would never happen. Disney may charge for premium access outside of regular park hours (like they do with EMM) but they'd never charge a blanket fee for a single ride at all times. Not because I think they are altruistic, but because they'd have a real false advertising problem on their hands based on their marketing of the ride thus far. And as for getting a spot when you book a hotel, I foresee a lot of burner hotel rooms if that is the system, which isn't helpful for them in planning inventory.