Well you need to be realistic, Kev's performances fell of a cliff and he is just an injury away - no matter how severe - to come to complete stop as a player. He is is like 95% down on what he was 2 years ago, not even a shadow of himself.
Gundog is still playing the same game, very often running it and although he is slowing down what is natural with his age, I can see him performing alongside Rodri and another MF. Very similar to how Merlin was fading away, unlike Kev who just got broken somehow.