ALL IN THE RELEASE
I won't try to convince you that I haven't rotated my hands a lot here, but the truth is, my strong grip actually reduces the amount of hand action required. Try gripping the club so you can see another knuckle on your left hand (for right-handers) when you look down at address. You'll need less hand action to square the clubface through impact.
This might look like an off-balance finish, but it doesn't feel off-balance to me. I suspect my funny finishes relieve pressure on my joints. If my front foot stayed glued to the ground from start to finish, the stress on my knee might lead to problems. I'm not saying copy this move, but staying healthy isn't a bad idea.
HIT UP ON THE BALL
Most pros hit their driver on the upswing, and you should, too. Teeing the ball high and keeping your head back through impact are the big keys. You want to launch the ball higher with less spin. That's the combo that lets you max out your distance.