the bottom line is - if it works for you, and you can repeat it...then you are good to go.
For teaching other students though,it is more important that the teaching not obfuscate matters, and make it difficult for them top repeat and build in whatever it is you desire them to learn.
In my book, "The Blueprint For Gold Excellence - Building A Swing You'll Never Forget" I teach the move back to the lead side that happens before the upper torso, shoulders or arms start back down, and in fact encourage the student to make an additional pull at TOS simultaneously to moving the lower body. If you have a good set up with a sufficiently wide stance, keep the weight on the inside edge of the trail foot, and maintain your spine tilt ( slantidicular ) at TOP of swing, You have plenty of Hogan chain action/torque, and your hips do what they do, and all is good. From page 27:
"THE VITAL MOVE begins with a movement of the lead knee from behind the ball, to be positioned directly over the lead foot. Immediately after this move has been made, pull back even further with the trail arm, while dropping the arms slightly. While this ADDITIONAL PULL BACK isnt essential, it is a great power increaser as you are increasing the opposing forces even more by using dynamic movement to accomplish this. UNDER NO CIRCUMSTANCES SHOULD THE ARMS BEGIN TO SWING FORWARD, NOR SHOULD THE SHOULDERS BEGIN TO TURN BACK TO START THEIR MOVEMENT TO THE BALL. THE ARMS SIMPLY DROP SLIGHTLY. STAY PUT, OR MOVE SLIGHTLY FARTHER BACK AS DESCRIBED ABOVE AND SEEN HERE:"
You can see that my hips have moved forward, while my backswing has increased. So technically, My hips are "sliding during the backswing". I learned the hard way this summer that this move was present in my driver swing almost every time, but almost non-existent in my iron swings. I have spent all winter building it into my swing for all clubs that I use a full swing on. It can be learned, but only if you practice it. Gets the job done by doing it, without a lot of talk about rotating this or sliding that.
Never quit til you have a swing you'll never forget!