Yeah I don't disagree about the standard of our signings. It's been an otherwise excellent window, but I do think that you may be clutching at straws a little bit in terms of the Coutinho argument, simply because this was an issue even before we lost Jack, and Jack was the epitome of ball retention.
And unfortunately there are a fair few teams, who as you suggested was the case in the Man Utd game, can dominate possession. In those cases we struggle to win balls back. Luiz does a good job of intercepting the ball, but that's really only half of the job of a 6. We are kind of reliant on the opposition playing to our midfield strengths.