I'm not sure if this has been pointed out yet (sorry if it has), but the three cities in this shot don't use the same architecture (and by that I mean the small straddling buildings around the city center and districts). You need to look
really close to see what I'm talking about.
The southern city has an abundance of red/brown/green-tone style of houses and apartment blocks, while the northeastern city has a small supply of colourful apartments (seen next to the harbour), which can't be found in the southern city, and vice versa. Also worth noting is that the third city, the north-central one, has a mixture of BOTH styles (the "southern" style is hidden behind the entertainment district, and the "northeastern" style is next to the the new purple district). Neither style is currently found in-game, and they both clash
considerably so they can't possibly be part of the same architecture group. Could this be related to the loyalty system? Can cities flip cultures when they've been influenced by nearby civs? If so then I'm 100% down for this expansion pack.