To answer everything at once -
1. I do not believe the pumpkin house has sold yet. Last I heard, the price was down to 3.1m.
2. There is a great deal of variation throughout the building stock in the neighborhood, but all of it is very subtle. anything different is generally fought pretty hard by the locals. And by locals I mean a small, but vocal group of seniors who would like the heights to be much more suburban than it is. The craziest stuff proposed for the neighborhood, such as 1 ft tryon died, and I fear the wild 4 tower complex will be killed. I think if something unique were to happen in the neighborhood, it would be a single family home of modern pedigree on one of the few empty lots available for such. Alternately, someone could tear down one of the trashier single family homes and do the same.