If you haven't seen the nobservation hashtag on Twitter yet, you should check it out. Teachers sharing their truly crap observation feedback. My favourite so far:
"#nobservation. A lesson on Gandhi adjudged to be insufficiently Welsh. Suggestion: call Mahatma "Geraint" instead."
I seem to have blocked out years of observation feedback but I do remember being told years ago my lesson would have been better if I'd got 34 year 8s out of their seats and moving around the tiny classroom. Pretty sure it would have been chaos! That was back when kinaesthetic was a thing.