Yeah, I don't know the answer at this point. I watch almost every game and I don't see a difference in approach, stance, swing angle, whatever. Perhaps the adjustments are so subtle that I can't pick them up but I doubt it.
Most reports say the guy is willing to do the work and put in extra time at the cage and Traject Arc so I don't doubt his heart.
Maybe he is one of those guys who doesn't learn and its purely a natural talent play where he now has hit a wall?
Damn curious.