You can't count Mitchell, Coulson or Mahady as Championship level options. They're barely out of school and two of them in L2 for a reason - not ready yet. Arnott is a bit part player at the moment, gaining experience, and whilst he has impressed, he's some way off being a reliable starter. Even Varian remains unproven, although he at least has some level of achievement behind him, albeit elsewhere. JMcG can't rapidly advance the others' development in such a competitive league as the Championship, so there's a difference between bodies and viable options. Keatings is a different proposition. He's clearly not fancied by the management team, so now is the time to get the finger out and show what he's got left. I'd love to be wrong but I don't think it's much.