mu does not need here current coach what so ever. if he's bugging the athlete he can shove off. no problem.
mu ran 49.5 in 2021
based on a natural progression, 48.5 400 is not off the table, a time that puts you on the podium.
sure the 1500 dabbling is going to help in the last 200m of the 800, down the line.
right now in the 1500, you need sub 350 ability to medal, and that is much more speculative to run than the 48 400m,
with that said, mu's coach may be sabotaging things so the good 400m result never happens.
based on the runners world interview, mu seems to have here head screwed on straight and has sorted out what she wants and likes,
i can't see a pimp-coach in that mix.