Eli isn't without blame and as a guy getting paid to be a top flight QB he should be expected to lead his team and make plays even in the face of adversity.
With that said, even with an average offensive line, I think you could win in the playoffs even with 37 year old Eli.
It just seems that the construction of the roster, with an aging, unathletic QB, you'd want a top flight offensive line, or if you had an athletic QB (Wilson, Dak, Rodgers) you could afford to let them move in the pocket.
As good as Dak is and will continue to be, I'd be curious to see how Eli would play behind the protection he receives. That isn't taking anything away from Dak either - just more so I'd like to confirm what Eli has left in the tank.