On a more positive note, I also just remembered the displays of model Missions near the stagecoach area (and near the old small chapel/Blueberry stand).
Two other details that continue on to this day: the corpse with the bullet hole in his head that periodically rises out of his coffin, and the heartbeating grave at Boot Hill. It's always fun to watch people discover that for the first time! Not to mention the fact that the sounds from the mine at the entrance to boot hill have been restored. Knott's may have lost some of it's charms, but it still retains more than people give it credit for.