Why an uncocked left wrist?

[tball88]

I have a slight tendency when hitting to get flat on my backswing and to come in under plane on the downswing.

One way I can correct this is to make sure the club is outside my hands on my takeaway, this gets me a little more on the correct swing plane. How ever to do this I need to maintain a little wrist cock on the backswing to make sure the club is staying out side of my hands. Will this work with a hitting motion or must the left hand be completely uncocked at setup?

Thanks