Kind of depends on your perspective of Zuldazar. The zone might not be one great mega-city like Suramar, but a lot of the different sections of the zone play their own part in Zandalari society. Warbeast Kraal is where they tame beasts of war, Warport Rastari is the primary military harbour of Zuldazar, the Mugambala serves as the military headquarters, the Garden of the Loa is a shrine-garden intended to house various loa, Atal’Gral was once a great temple-complex, Tal’Gurub is a ghetto intended to house the Gurubashi, the Temple of the Prophet exists as the dwelling place of Zul, then there’s the tomb-city of Atal’Dazar, and so on. Even the jungle serves its purpose as a sort of reserve, where dinosaurs are free to roam until the Zandalari seek to tame them and hunt them for food. This is why a section of the jungle is actually called “the Reserve.”
I guess there’s lots of jungle between it all because like the Night Elves, the Zandalari live in harmony with nature, just in a very different way. In addition, a lot of these areas are occupied by enemy forces because well, it’s a levelling zone, of course there’s enemies everywhere.
As much as I would’ve liked a Zandalari Suramar, I can understand Blizzard not having the resources for that, especially when Zuldazar was designed to be a levelling zone rather than compelling end-game content like Suramar was. I guess we just have to deal with the abstraction.