The coach who never played the position sometimes sees it clearest. Distance can be a lens.

Never having done something has one advantage. If you have played the position for years, your own habits are invisible to you, because they feel like the position itself rather than one way of doing it. Someone watching from outside has no habits to hide behind and sees what is actually happening. Experience gives depth and takes away a certain kind of clarity.

When you are stuck in something you know well, ask someone who does not do it what they see. Do not brief them first. Their naive question is often the one that turns out to be the whole answer.