So if layback means the effective club loft is increasing and the only real way to increase loft while having a bent right wrist is to play the ball slightly forward of normal, this may explain the motion's tendency to slice.
Hmmm
It is the uncentered Clubface Motion of Angled Hinging that causes the Slicing tendency. This uncentered motion causes the Clubface to go from Closed to Open relative to the Clubhead line of flight.