I prefer the visual. Once I see it I can visualize it when I need to. Thats how my brain works and how I learned most things. Telling me something doesn't work as well for me.
At a pool tournament would you be for or against a friend in the stands using a sign showing where to hit the cue during a specific shot.
I am think local amateur tournament with teams.
If I had a coach telling me which shot for position it would cut down on my errors a huge amount.
In other sports fans cheer, should billiards be that type of sport?