Yes that would be a possibility, effectively rolling the 2015 and 2016 tokens together, but you'd have to be pretty sure from preseason testing that you were far enough behind to give up on the whole of 2015. You'd have the added benefit of being able to change parts of the PU that are set to be completely frozen for everyone else in 2016 (cylinder bore position, parts of the valve drives, covers, ancillaries drive).