That's an interesting approach I would not have thought of.
With beginners (which is another topic) I do advise to align the thumb with the forearm and rod, bend the elbow to bring the rod back and stop the forearm at vertical while allowing the wrist to flick the rod tip to 2pm. This is the only allowable wrist action (for the backcast)*. This method is only for the basic low-power "trout" cast intro.
But I have to wonder, with your technique how do you get different people to drift past vertical consistently to 2 o'clock if teaching a group to stop at vertical?
*and a complementary wrist flick at the end of the forward cast after extending at the elbow similar to hammering a nail for a picture hanger - stopping the hammer so it would not go thru a freshly plastered wall.