yeah, I mean all we can do is speculate based on the limited public data we have, but if the shape and velo of both pitches are about the same as previous years, and the only thing we know is different is the usage of the slider being increased and the sinker decreased... the only logical deduction is that the change is useage is making the batters wait just a split second more before they decide what to do which is definitely advantageous to the pitcher.