Cook: Should He Stay Or Go?

Without any doubt, England needs Alastair as an opening batsman - but has the time come to hand over the leadership mantle to Joe Root, the captain elect, in the wake of the team's 4 - 0 trouncing by an admittedly excellent and well balanced Indian squad?
http://www.telegraph.co.uk/cricket/2016/12/20/england-need-alastair-cooks-power-runs-top-order-leadership/

http://www.telegraph.co.uk/cricket/2016/12/19/alastair-cook-has-hinting-resigning-england-captain-long-time/