Although it could stop there I can see why it doesn't. There just isn't enough room to get by those watching it for a continuous flow of traffic when that is the main path in and out of the park, with the backup route (Hollywood) already being closed off for the upcoming stop. Also, that stretch of street is longer than the others, would the floats spread out more to stop or stay in on central confined area?
I feel bad for those people watching in Production Central as well, but know that putting the information about the show stops in the map would overly crowd those areas.