Not gonna reply to that cause you pretty much explained everything, variety would be fun and not a hard thing to do.
I am going to add another point but its mostly related to the host thought, events like Wall To Wall which sometimes end up without any winner maybe because the host made a hard obstacle and sometimes impossible one, an event like this is 5 rounds when there's a no winner round its because the host made a hard obstacle and no one could pass it, which leads us to have 2 rounds(most of the times) with no winner.
I suggest that ET's should re-do these rounds that have no winner, cause after all the events main goal is to entertain players and that what the players want.
As I said it depends on the host mood, but most of the hosts don't bother to re-do these rounds, maybe make it a rule or smthing.
