[12 piece bucket]

I use the left thumb as a pp to push my wrist into an uncocked conditon. The earlier and faster I try to do this the greater the clubhead lag pressure.

I've heard it said that this is negligable. I'm just wondering if the word should have been subtle, instead.

Uncocking, as I understand it is a pulling motion done primarily with the #2pp assisted slightly by the left thumb. But, reverse that, by using the left thumb then it becomes more of a pushing action.

Would throwing in this manner still be considered Drag Loading or a very subtle Drive Loading?

Not a bad thought at all. With Hitting you are PUSHING on the thumb. But with Swinging you are essentially using the Left Wrist Throw with your thumb thoughts in my opinion.

But focusing on your thumb uncocking down plane you are extending the lever assembly down and out on plane which basically is kinda like if you are uncocking down and out on plane you have NO inclination to flip it.

Your description sounds like Swinging to me . . . but maybe with a non-automatic release. You could allow/let CF sling your thumb down too that would be more automatic but the motion is the same.