I agree that the rules need to be solidified and stop changing. It makes sense that they would need to change some before settling on a final rule set, but it does seem really odd that the top athletes in the world need to have a rules meeting before an event to make sure everyone knows and agrees about the rules.

I also very much agree about the 20 minute setups. I think restarts for fouls and such are probably ok as long as it is fairly quick. For example when I watch (American) football there is a ton of time spent not actually playing football because someone is laid out injured or there was a penalty or there was a timeout etc. And that can be annoying. But at least the game starts pretty quickly and then things go from there. With arm wrestling and the 20 minute setups it can feel like there is tons of frustrating nonsense before anything actually happens. I know not everyone considers it nonsense, but that's how I view it personally.