To be fair, the new stuff is kinda cooler than the old stuff. Pretending to be furious because the "new devs aren't respecting the old guard" is ridiculous though, especially as many of the old guard are better off forgotten anyways. Also, without that we wouldn't have had changes like cross-faction play or legendary transmog etc. Old doesn't always mean better ...
But yeah, I think a chronicle style book that actually tells us about the connections between the Shadowlands and Azeroth instead of just hinting at that stuff would have helped a lot. Just look how much better the Thunderking became once we got his full backstory.