1. Youtubers slowing changing to other games
Yes this is because youtubers will get bored of it. However other youtubers will come to take their place.
But only worse youtubers that only care about money will take their place. Older MC and generally youtubers only cared about having fun and recording for their subs, but now they cause drama to get money and attention. There may be more Youtubers, but worse ones.
2. The PvP community
Yeah the pvp community is certainly going downhill but I think it will be alright as long as everyone is a bit nicer to everyone else.
Well a lot of people are getting bored of PvP or leaving because of the stupid, non-sense changes they did to PvP. Also, the community isn't going to magically start being nice to everyone. People start to hack because they can't win by themselves and people are offensive to each other because PvP is
competitive and serious to them (although it's not that much for me)
Although I wrote this, I agree with some of your other statements.