Well I think to an extent I know that is what will happen or that is what was about to happen because if you check very well Liverpool have been winning almost all their Champions League game and that round is almost over if not over and anytime this kind of thing happens no that the team is going to lose or draw the match and that was what happened yesterday so the game wasn't a surprised one to me and Liverpool have been toping the champions league table, so these are the reasons why I am not surprised but for instance, if Liverpool needed that game to qualify there is no way that PSV will win them and if you check there stats you will see that PSV haven't win Liverpool except this yesterday winning, anyway kudos to them.
Liverpool are well aware that they will still qualify even if they lose by a big margin because Liverpool will still be top of the table in that round even if they lose in the end. But if Liverpool hadn't lost yesterday's game, of course that would have been extraordinary because Liverpool would have been seen as a team that has never lost in the Champions League this season. But because Liverpool did not really want that so they did not really exert their ability to get another win because it could have other effects on their own players. So Liverpool preferred to play relaxed without having to sacrifice the players excessively in yesterday's match.