im not impressed with the NPC's from what I saw in the trailer they will always be far away, except for dovahkiin
And that guy Dovahkiin is cutting up, he was pretty close too.
Anyway, it's interesting that people bring up diversity, but it has to be cohesive diversity that makes regional sense.
But you have to look at it, building itself up, like you would a settlement in Real life. The Land defines the People, and the people define the architecture.
Going back to our overused friend, Morrowind, you see in the Redoran people, despite being as Morrowind-native as their Telvani rivals, are very different. The Redoran themselves are very defensive, and even their structures represent that, taking the shape of an arthropod's armored exoskeleton. But why? Well, you can look where they live, in the shadow of the Red Mountain, with nearly unrelenting blight pelting their homes with ash. This feeling of "At war with nature" a foe that really can't be bested, seemed to have colored the disposition to be "Dig in and stand your ground" types.
Conversely, the Hlaalu inhabit the fertile regions of the Island of Vvardenfell. They're generally warm and welcoming, and their large, open structures and settlements reflect that. Their Liberal attitude likely is a result of being in close proximity with the Imperial settlements, which, coming from Cyrodiil, must have looked at the Ashlands as anathema to their way of life, rather than fight an unstoppable force, they embrace the Imperial way and prosper with it.
The Telvanni are a little harder to lump up like that. Telvanni wizards are individuals of extraordinary power, so perhaps it is they who can choose the land, rather than the other way around. But, Telvanni prefer to settle away from the mainland, on small islands around Vvardenfell. If this seclusion is a result of their elitism, or the other way around, I think only the people who created the Telvanni would know. But their mentality is more obviously reflected in their architecture more so than any other culture in Vvardenfell. Their labyrinthine towers cannot even be explored without some affinity for the Arcane.
Anyway, my whole point of that rant, is to show that there's more to the diversity of a city, than the actual, superficial architecture of it, of which we really haven't seen enough of anyway. It's the people that define the city, not the other way around.