There is also the fact that we were changing and going to a back four and Maxime being available again.Steve Cotterill
The full-back made the switch to Cypriot side Apoel FC at the start of the week for an undisclosed fee.
But Cotterill says that a need to balance his side, combined with a decision to switch to a flat back four, plus the opportunity to save on wages all played a part.
"Emilio did great for me," said the Blues boss.
"I was really pleased when he came back into the team after Maxim's injury, he gave his all in every game.
“But I think it suited Emilio more to be a wing-back than it did a full-back and I think it suits Max to be more a full-back than a wing-back.
"There is also the fact that we were changing and going to a back four and Maxime being available again, who has been brilliant for me since I came in here.
"With Carl Jenkinson, Maxime Colin, Josh Cogley and Emilio Nsue we had four right-backs, and just Jonathan Grounds at left-back.
"We’ve only got the young boy Steve Seddon behind him that was already at the Club and there's Cohen Bramall.
"So, it's four right-backs and one experienced left-back.
"So, that is all part of the balancing act for us because you don't want four right-backs that are going to use up big wages that perhaps you can put towards another position where we perhaps haven't got so much balance."
Cotterill also confirmed there had been no further developments at this stage regarding Arsenal loanees Carl Jenkinson and Cohen Bramall and whether or not they would be remaining at St. Andrew's for the remainder of the season.
"There is no change at this moment in time," he said.
"It's not me that's having those discussions but I'm in talks with the person that is having the discussions if you know what I mean?
"We've just got to wait and see how that one pans out a little bit."