Y'all want Blizzard to start making great game again? Fine.
Blizzard should go back to how they treated the community back when they were making great games. Largely that consisted of not talking to a lot to them and listening even less. Social media is now a firehose of people giving them "advice", most of it directly contradictory to other advice they get. They should just shut all of that shit off, sit down and start talking among themselves about what makes great games and stop pandering to their customers contradictory whims and nostalgia.
My unasked for advice to them: start worrying more about stories. Big stories, little stories, connected stories, standalone stories. MMO's are about stories at the end of the day. They're not about hair-splitting theory-crafting of classes that are only played perfectly by a percentage of players in the low single digits. Stop with that bullshit and start making stories that exist in the world. People read books, go to the movies, etc. for the stories. They can occasionally admire the technical skill that goes into them but without a story it doesn't last. WoW is a little like that: heavy on the engineering at the expense of meaningful stories that have depth and occasional subtlety.
Stories are universal. The number of people who really care deeply about the percentage chance for a proc in combination with another proc is so tiny as to really be unnoticeable.
Classic works not so much because there's some big over-arching story. It works because the stories tend to be small and disconnected. Everyone remembers "Mankrik's Wife". Well, there you go. Tiny story that everyone who has ever played probably knows or has heard of. It also works because you have to stay awake to play it properly. You can't exactly sleepwalk through things. They're not always difficult but the game will let you know if you stop paying attention. That's about right.
More of that.