There were a few places that were successfully rebuilt looking almost exactly how they used to, with some expansions in either territory or places of importance.
Cherrygrove City is one of those places;there's a slightly bigger amount of houses, and the townsfolk is different, but virtually it's the same, with the houses that were rebuilt and the Poke Center and Poke Mart remaining in the same place they were. A dock was also added, in order for ships to be able dock easily.
If this answer your questions, then I'm glad, if it doesn't, then just tell me what you didn't understand and I will gladly answer.
And don't worry, it was my fault for not clearing things up, after all