In your earlier plan, you had speed endurance (Thursday) followed immediately by speed (Friday). Also, I made the assumption that med ball and plyos are done at least with medium intensity. Two medium intensity means can easily add up to an overall higher intensity day. Just because you do ET on that day doesn’t make it low intensity. If the plyos and med ball are of lower intensity, then that’s different, but I still wouldn’t do speed endurance the day before speed.