So in most of the previous expansion quests hubs were pretty big. We were given new cities/towns in each of the new zones with unique architecture. Let's take a look at few of them:
Thrallmar in Hellfire Peninsula:
Honor Hold in Hellfire Peninsula:
Garadar in Nagrand:
Telaar in Nagrand:
Agmar's Hammer in Dragonblight:
Valiance Keep in Borean Tundra:
Even Crossroads in Northern Barrens from Vanilla WoW:
Or Sentinel Hill in Westfall:
Nowadays all we get is a 2 tents with a few NPCs.
Would you like to see bigger quest hubs in the next expansion?