Strange Additions Delay a Sale

I showed a house today that had a poorly done addition. It was a shame, because the home was located on a pleasant street in an excellent school district. The original three bedrooms and two bathrooms were in good condition...in fact, the kitchen and both bathrooms had been remodeled, and the rooms were all spacious. But the owner had added another bedroom (or perhaps a large study) along with a third full bathroom to the front of the house. Even though quality materials were used, I very much doubt that an architect was consulted. The entry hall was long, strange, and dreary, even with the addition of several skylights, and what had been the exterior of the house was on one side, including a kitchen window, which now faced the hallway instead of a garden. The addition was located on the right of the entry door, followed by this same hallway, which led to double doors that opened into a large dining room. None of this showed in the MLS photos.
The original house would have sold right away, but this configuration will be a hard sell.