Depends what you see mate for me. I was coaching kids so I always encouraged them to problem solve on the pitch.......so long as your right back doesn’t decide to play left wing etc etc.
Understanding your re-set shape is essential for kids but it’s not (or with me it wasn’t) absolutely rigid - it was a guide. In defensive terms it’s essential that you speak / think as a set - sometimes fb needs to tuck in, sometimes the cb needs to drift over and sometimes the midfield can drop in.
Also make the coach aware in case he / they haven’t picked up on it yet.
Sometimes it’s the setup, sometimes it’s someone not understanding the role, sometimes it’s the opponent.
It’s all fluid and - to me now - I watch that much more than just the ball.
On Saturday for example - I personally think we played as better than we did against Newcastle few weeks back but we won 4-0.........the difference was an early goal in each half........
Not sure I totally got your Q but hope that helps