Why do you think he will limp through next season?
He has barely dropped off any this season from the previous one to give the impression he will be hitting a wall over the summer.
We shipped Barry out for being slow and past it and then he proceeded to play 4 more seasons of over 32 PL games a season for Everton and then 25 more for WBA and then two further seasons in the Championship.
You don't think Fernie would be capable of playing against Newcastle, Villa, Soton, either side of a big game, if we were to ease him down from the top-level games?
He still has a lot to give imo