A couple of notes to the timeline that should be added:
*The purple-red-orange turntable patterns made their debut with the start of soaps week.
*For a brief period beginning on 4944D (5/26/83), whenever a game has its total prize package announced, a graphic in the same font as the Showcase Showdown win graphic at the time would appear. This only lasted five episodes IIRC.
*The first playing or two of Give or Keep had the top portion of its SP podiums still with the previous style on them with the new design on the lower portions of them, by the third playing (4932D), the top portions had matched the side with the G-T asterisks on them.
*Sometime in April, Clock Game's border and base changes from a dark green to a lighter green to better match with the green edges of the turntable. That same tone would last up until the next revision in Season 31.
Hopefully April Fool's could air as a special one-off around April Fool's itself right before the next batch of episodes are dropped.