Japanese timer makes sense: Power On helps with evading those shady "hardware manipulation" tricks while The End helps set a real end to the game. I would personally prefer having the run end at the last input, but for some games that may not be possible since your last input is your last attack and you can't know 100% when the last attack is, The End makes it easy and clear for all the games so I completely agree on that.

If a run is cooperative it should definitely be noted, dunno if i like this as being an official run and not something separate tho

Everything else seems fine to me so not much else to say