As someone who has umpired football, and had mates that have umpired in the AFL system. I will tell you from my experience, that decisions don’t get analysed as much as people would think.
Because umpires descisions are ‘subjective’… the umpire will argue to his coach that he made the right decision. I’ve been in this position. As I said earlier in a post, the coach might suggest that there should be more consistency about ‘the call’, but he can’t enforce it, because every decision is judged in isolation.
Unless there is a complete howler, which is plain wrong, there isn’t a lot for coaches can do. We know this, because the umpires department will say ‘95% of decisions are correct’.
They spend more time on coaching communication, team work & positioning than they do on analysing decisions.