Thoughts on adding automatic ping when a teammate completes his backing animation for map awareness?

Something i'm trying to get better at is noticing when my teammates leave lane. Many times a teammate in mid, top or bot will back right as i'm thinking about attacking a lane. The freed enemy laner easily roams and wins the team fight.

So, while i'm personally trying to get better at knowing where my teammates are, I figure riot adding an auto ping at the location someone backs from would help all of us in these situations.

I imagine the ping to be similar to what you see when you reveal someone with the vision plant