The league catching up to McVay's offense?
Well for starters that assumes that McVay will not make changes and adjustments. That assumes that young talent such as Goff, Kupp, Everett, Higbee, and Reynolds will not continue to improve. That assumes that Henderson will not add a dynamic element.
So yes Gurley is a bit of an unknown but the good news is that they are going to be more conscious around managing the knee and hopefully with better results. The good news is that we have other options to balance the workload.
I expect that the offense will be better provided the OL holds up with the 2 new comers.