When it was clear that it would be Edouard making way for Steve Lomas, there was a displeased reaction from some supporters, but Glenn, explaining his reasoning, says: "Edouard played well and I am sure he will figure many times in the team this year.
"But Steve Lomas, who at times last year when he came back was inspirational for us, was someone I wanted to get involved as soon as possible.
"Edouard and Steve Lomas hadn't even trained together because Steve was rushed back into action.
"They has never worked together so it didn't make sense to pair the two of them together, whereas this week and last they have spent all week training and I am sure they know more about each other's game.
"We have put a lot of practice games on that have involved those two in midfield, because I am sure there will be times this year when those two are our central midfield pairing.
"It wasn't a reflection on how Eduoard had played and I recognised he had done well, but Steve and Michael Carrick obviously knew each other's game a lot better."
Steve is closer to full fitness now, and Glenn adds: "Steve came into the Charlton game only having played 45 minutes at Orient when the shin injury occurred.
"Let's hope that is the only injury he gets and that he has a fine season.
"We have a few options actually, in the centre of midfield - it is one are where, when everyone is fit, we have got some strength in depth."
As for the defeat by Charlton, he says: "I have gone through it, not only in the mind constantly, but on the video.
"The poorest aspect is quite easily identified - it is both of those goals.
"They were two horrendous goals for any level, completely unacceptable for a Premiership side to concede from two set plays, one a long throw and one a corner kick, in the manner that we did.
"It gave us a mountain to climb - one goal was bad enough.
"You have to put your hands in the air and say they defended magnificently because without doubt, and people won't realise this, we had the lion's share of the possession.
"We had a huge amount, which, admittedly, we didn't always do well with.
"That second goal just before half time almost made it mission impossible.
"As hard as we tried in the second half, and the three or four half chances that came our way, when they wouldn't go in you started to get that horrible sinking feeling that it wasn't going to be our day whatever we tried.
"That is the way it worked out, and when you are at home chasing two goals you leave yourself fragile at the back."