To my good friends LeeD & TennisKing ~
Surely a good argument to the mechanics of watching the ball upon contact has more to do with getting back to the basics which is what one needs to do whenever you find yourself having trouble on the Tennis Court. But it's the same as active awareness of your footwork and/or positioning as well.
The more advanced (better) you get at this the less you have to think about it. It just occurs during play. We all know this, any 3.5 Player knows this but we tend to forget when shot production is going off or you find yourself pulling up on your shots or hitting up off the back leg because we get so hung up on watching the ball, we watch it too long.