Requested this before but doing it again. I arrange all training myself. At the end of every season, one of my routines is to go through the calendar for next season and clear out all the training that (for some reason) the AI has put in there. It's a very laborious job as you can see. I do this as it makes it much easier to see where the matches are to put in my own sessions.
I also do it for the u18 and u23.
Can you either put in a way to clear an entire seasons training with one click, stop the AI from putting in training sessions if you take full control or give us an option to select one schedule to be the default? I have a custom one called "Clear" which is a week of rest.