I have been working on the same thing. I am not consistent yet, but the early results are promising. So far I have found that to really focus in on the back tension it takes to get to bone alignment at full draw, I need to forget about my string hand. Setting the deep hook helps with that. I am working on getting consistent with the deep hook so it is always an automatic physical action. The deep hook resists plucking as well, and that is an advantage, too.
I think I am going in a good direction with this. And, Terry is right, the draw weight feels lighter and more effortless with a deep hook. I think it takes some of the focus on the hand away and that lets the deep back muscles get more engaged.