Reddog, you remind me of when I was in HS and trying to work on my basketball shot. Trying to do all the right things when it came to form and it just messed everything up, to the point the coach came over and asked wtf I was doing, stop it.
So try going back to what a more natural position is for you, when it comes to starting your swing. Right now, with your hands that far back (and I understand the concept of teaching your body to have your hands there for the whipping action), you're causing everything else to be out of sync.
I'm trying to think of a simple way of explaining it.
When you throw a big punch, you don't start throwing it with your hand already ****ed back all the way. You have a wind up, which is part of the 'whipping' motion... If your hand is all the way back, you're waiting for the rest of your body to catch up so you can continue your punch. That includes your step forward in which you load up on your back leg to push off, tensing your mid section to get that twist when you throw the punch.
When I see your vids, your hand placement looks unnatural and I think that affects your step forward, where nothing much is happening with the rest of your body. The whipping of the bat first starts with your windup, or the beginning of your whip with the rest of your body. As you naturally step forward driving off your back leg, the rest of the body goes into position (which includes you moving your hands back) for the power knock out.
For what it's worth, thanks for posting up the vids and keeping it all in the same thread, makes it enjoyable to track and also causes me to look at myself and how I'm doing things.