Here is the problem i see with that picture. As we know, the buildings will never be tall enough. As a side note, the taller we make things the crappier it will look as the server loading will only load the bottom half of the building. I would love to see more detail in the buildings but NO ONE is building them. The only reason there are so many that look the same is because I followed a default layout and threw up a few buildings to make it more complete. In the game most of the buildings are pretty plain and if we go off of concept art like that then we will just end up with more dissapointments down the road. I see where you are coming from with this but I cant see the point in trying to design a city off of concept art.
Though Archie. You have access to Unova now so if you want to build the rest of Castelia the way you are thinking, thats fine by me and we can compare the two halves of Castelia and go from there.