Back in WoD we were expecting Karabor and Bladespire as huge faction hub capitals. Blizzard's reasoning (or their rumored reasoning) was that huge capitals left places of interest to spread out and inconvenient. Players complained and time moved on.
With BfA came Dazar'Alor and Boralus. Massive faction hubs. Almost bordering on unofficial zones in their own right. Each with multple inns, flight paths (at least Dazar'Alor, haven't gotten to Alliance side yet).
So what is your preference now that we have a taste of both worlds? Dalaran type hubs with everything compact and a short run away? Or BfA hubs that may take a few minutes of running to get from one area to another, but give a sense of size and grandness.