Yeah, I feel like take away and set up are probably the biggest things to look at. Once you get to a certain point you really can't change what is going to happen with your swing.
I think I worry more about the backswing than the downswing when looking at videos. I have obsessed about positions and club position before and I think it was more of a determent to my golf game. I got too mechanical and didn't really swing the golf club.