Well, that's incredibly stylized. My primary suggestion would to be include some sort of neck, because it looks kind of like the head has been squashed into the shoulders.
But to the question of efficiency, it all comes down to whether or not the method allows you to draw at different angles or expressions. Cause all that matters in the end is whether or not it works for you.
If you can work it to be dynamic, then you will have yourself something impressive with that style.