My biggest complaint is that it defaults to “recommended” instead of “library” which means for new users (family members you are trying to help remotely) don’t see the videos in your collection but instead a random unordered list to scroll sideways.
After you select library to see everything, it doesn’t save that view as default unless you go into settings and change it to remember changes.
A new annoying feature they added is when setting up a new account, the default is to send every video you watch to all friends/family unless you select disable. So you can’t even setup quickly by putting in a user/password and being ready to go. You have to talk family members through setup or everyone with access to your Plex will get email spammed with everything that person watched.
I have home videos on my server and this means lengthy phone calls to family so they can actually see the videos.