I think some of the problems/concerns/displeasure (however it can be phrased) came from the lack of certainty , concrete info (that people might have WANTED, even knowing that it was not to be EXPECTED)
I think people totally understand (at least they should ) that Disney is taking all necessary precautions -
The only thing (and it can certainly change) that I think was a little much was the use of masks at the pool deck/lounge areas. (If that was even confirmed)
Honorable mention to park hours - for the summer, opening early and closing early doesn't sit well with many - (JMHO)
As far as other issues - (and these are extremely important)
Which hotels are going to be open?
Transportation/busses/DME- how are those going to work ?
FPS ? are they still a thing ?
ADRS - same - how will they work going forward
Park reservations ? How will they work ? Who gets priority ?
I think these are justified concerns when booking a Disney trip, especially because everyone, by now, is used to planning ahead, because that's basically what ppl are lead to do, due to the system that (before yesterday) was in place -
Just my .02
There are definitely two sides to the frustration coin -