Hoopla is being replaced with new offerings including fireworks. They are also extending the event by adding another weekend.
PUSH was due to a contract dispute between Disney and the owner of the property. It could just as easily been the owner who walked away or had unreasonable demands. So to "blame" Disney is shortsighted.
Miyuki left on her own accord and was not "fired" by Disney, though Disney did have to put some limitations on her show which she did not like.
The AK parade can not be run while construction is going on due to the backstage areas. It is a side effect of the park expansion. There have been multiple rumors that, after the expansion, there will be a new nighttime show at AK. Also, if nothing else, I would not be shocked if a new parade was being worked on at this time.
Legacy Fastpass was replaced with FP+. Doesn't matter if you like the new system or not, it's not like it was just removed with nothing in its place.
Yes, I know that making a post that lists all the things disappearing from Disney is a way to "get a point across". And leaving out information is a way to make one side seem more important... but it doesn't help anything. At least including the information as to WHY things have happened.