How has it been fixed? It's still just Apple parsing the messages that came through like so and so reacted with some emoji to some message, and then attaching it to that message. But then this doesn't work with reacting to attachments like photos as it doesn't know which photo was reacted to.

Good point on photos!

Quality, group renaming, reactions to text-only messages - those have been addressed I guess. Maybe typing indicators (at least 1:1) too.