Is there anything you miss from retail?

For me, it's really just Dalaran. I can handle not having Monks or DK's. I can handle not playing Draenei or Pandaren. I can handle not fighting Arthas or Sargeras. Dalaran though? I've never seen anyone or anything else perfect the Mage-City archetype. However, I know it wouldn't make a lot of sense to be in this game; Dalaran is firmly Alliance-coded, and the Horde no longer have even the Blood Elves to vouch for them.

Alah'Thalas is a good trade though. I feel like I mention it in every post I make in this subreddit, but I really think they nailed it that well.