I don't really know the actual aging curve of the average power hitter, but nothing in jose's peripherals indicate much has changed: swinging at the same kind of pitches, same rate of contact, same walk and k-rates and very similar hr/fb%.
Only real change is a slightincrease in gb & a big increase in line drives, but those lead to an increase in babip.
He's currently on a babip cold spell, once it stabilizes, I think he sticks in the .370-.380 range.