I'm sorry but no. That midfield whilst pretty limited on the ball have trained all season to press in that mad dog manner. All Can and Wijnaldum can really do is run hard and fast. Gueye and Davies got ran over by them, Barry would have been road kill. Every man and his dog was saying no Barry before the game. It's too easy to come out afterwards and slam the manager for not playing him now. I think it would have been even worse had Barry played.
You've not named better fit defenders than Holgate and Pennington so Koeman had no choice in his backline but to go with youth.
...I think the problem was more how we played than who played. It's not hindsight, I said before the game that we needed somebody to sit in front of the back four to counter their main threat of Mane and Coutinho. Playing 3 in advanced positions basically meant we had 8 players when the Reds had the ball. It was nothing short of suicidal allowing Coutinho and Mane to enjoy themselves.
I was nervous of playing Pennington but I suppose he had to be given his chance some time. The team shape was a major fau pas. I know I'm alone in thinking this, but once Schneiderlin was deemed unfit Barry had to sit in that space he works so well. I appreciate he's past his best but the Reds wide players would've had to get past him before our back four was exposed.