Koeman knows the score, if he has managed this lad before, and he has, he is a good enough judge of a footballer to know if the boy is worth bringing in on a free as back up. I don't know about the rest of you, but, my standard was county comb. for several years, Koeman's was a little higher than that. My theory is that he knows a little more about footy than me, or even most of us. For what it is worth I think Cuko is good back up.
I do also hope that in premier league games Kenny or Holgate are first choices until Seamus is fit again.