Well since I have not seen your swing, but guessing from what you describe as a natural fade/slicer I would say you changed something in your lower body like either quit turning or sliding the hips and torso. This allows the arms/hands to turn over.

If you naturally slice/fade I would guess you are a slider of the hips and lower body. Anyway take a look at what is going on with the lower body. You want to turn, not slide, and keep turning, not quit during the down swing.