[Mike O]

Yes, Video always a benefit.
Without it - more of a guess.

1st option - it's only serious in your mind and really not a problem at all- after all we have all worked on things that are really not important. Head drop- what's serious - 1 centimeter, 1 inch, 5 inches, 10 inches?

Not sure quickness of hip rotation is going to cause you to drop your head - possible? sure.

I'd start with posture and distance from the ball. Look for what issues might require you to lower your head on the backswing and then raise it coming through? Imagine someone standing very tall to the ball - no waist bend and very close to the ball and swinging on a steep plane- that would create a motion like you are describing (not saying that's your issue- but you get the principle).

If you are quick- then what factors are making you or supporting your quickness- depends on the person but lower hands at address usually requires/allows higher hand speeds i.e. quicker swings and tighter grips at address - i.e. Hubert Green versus Higher hands and lighter grips at address -Fred Couples.

Would you like to talk to Tiger Woods? - PM "Bucket"

Ted, your package is in the mail.