Ugh, never be the first to upgrade to a new OS especially one that will handle two different chip architectures. However, to be fair about this hash reporting. This is not new. We run this at the network level at work. I can tell who goes to what sites, if I wanted to (it amazes me that people visit pornhub at work btw).
It's garbage that Apple transmitted that kind of data unencrypted and didn't have a better policy in place for handling server loads. The sluggish behavior is another one. It means you can effectively DDOS users by DDOSing the server that performs server side authentication of non-Apple user applications.
We have known for many years that vulnerabilities can arise from seemingly mundane stuff.