1) Wishes is no longer difficult to obtain at 30 ( it used to near impossible at 60 as well) but since parades and wishes were never available before fp+, this really isn't a great loss nor something one can say- wow, it used be we could get this. No, you could never get it and now you have a chance. Take a look at the 30 day availability for Wishes. My guess is you say Saturday is the day you want a fp+ for that. What's odd is that this Sat and next are absolutely the only 2 days sold out for the entire month. It's amazing that 30 days ago this coming Saturday was not open.
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2) Yours may be the only case I've ever read where Space was not available 30 days out. I'm not sure when you went or what was going on, but that just never happens. The Dibb doesn't even give fp+ availability for it as they only include the hard to get rides.
Many people report being able to make changes very close to their arrival. You seem to have had more trouble than others. Perhaps it was busy time, but I'm thinking it's probably a case of you not wanting to make any changes in your plans to work with what was available. And that's fine, it's up to each of us to decide what's most important on our trips.
So out of your list- A&E is one that I'm not at all surprised you didn't see available- but in all of WDW that's 1 ride. Just one that people are finding some trouble getting. And that is just the downside to choosing to stay off site.
When you choose off site, you choose 30 day availability. With that comes the need to be more flexible in your plans about when you will visit a park and what time you get for rides. If you aren't willing to be flexible, then you will have more difficulty in obtaining what you want. Choices- it's all about choices.
I thought I had read you choose to book a room on site for 1 day in order to get a jump on other off site guests for fp+? Why would you be looking at 30 day availability anyway?
Yes, it's a very dead horse.