Given Collins age, he's been good, but he does seem to make a major error every game. (2 in the City game) but that's down to experience, i like him, he's a player likely to have periods of good and bad form, and i agree with the bold above, which is why having an experienced fairly consistent back up CB would have been a very good option.
Sellars, Lage etc clearly thought differently.
However i wasn't too worried about our CB options until it became clear that Lage didn't rate either Mosquera or Toti, it now seems fucking outrageous that we flogged all of Dendoncker, Coady and Boly for what? About 20million and then play our best player at CB!