First, I was very impressed at what was pulled off for a first time format/event. I know a ton of hard work went into this.
My constructive feedback:
Absolutely MUST have some type of communication from the game pair being played on which challenge was chosen. It was a constant "Let's do some lip-reading," or "So-and-so is going to run over there and find out what challenge they chose." And other times, neither the commentators nor the viewers knew the challenge -- that was bad.
Actually, even better would be to have the players wait the 30 seconds it takes to run the aweseome video preview/explanation of the challenge chosen before the players begin. It was difficult to follow for usual pinball players -- I'm sure it was near impossible for any new or casual pinball player to follow and appreciate what was going on.
Perhaps the process goes like this: Player chooses the challenge. Have the referee lay a large-font numbered card (1-5) on one of the playfields to indicate which challenge was chosen. Then booth needs to be able to press a couple buttons to run the snippet of video explanation for that challenge. The booth then gives the green light to the referee that the segment is over, and the challenge can begin.
Another specific: The 2-minute challenge loses virtually all of its appeal for stream viewing when there's no clock on the video stream.
Fanfare: Would be cool if there was some type of fanfare to indicate that the challenge has been won. Perhaps for the viewing audience, provide a button that the commentator/ producer can push for one or the other player that highlights their playfield cam border in Green (to indicate that they won), making it obvious to all who won the last one.
Scoreboard: there needs to be a simple text field in the video frame that shows 0-0, 0-1, 1-0, or 1-1 for each match.