Call me crazy but I think we might be able to go into those buildings later. The camera angle has been changed to an angle that emphasises these buildings more, and the flat looking doors have been replaced with more 3D looking doors with a barrier. Also we have torches on the side of the road now, and the doors seem to stand out more. It seems like they're trying to draw attention to this area which would make no sense if there was nothing to explore, so I'm guessing the barriers will be removed maybe postgame, or some point later, just like the mall that's closed before a certain point.
