Liverpool needs to realize they are already getting the premier league title and they need to play better at UCL to have a better season. They already got humiliated at FA cup loss, so they are not going to make a treble this year, which is alright because not many teams do that anyways.
However, they could win both premier league and UCL at the same time, which is something not many teams can achieve, very few ever did that. This would be amount of money that would change everything for them, so they need to realize what they are dealing with here. If they can actually get a great result, then they will not be bothered, but if they lose to PSG, then everything will be terrible. Even though they may win Premier league, they could still get UCL if they are careful.
Liverpool are most likely to be the champions of England but it's football and there is absolutely nothing that can not happen because a bad spell of form can everything go wrongly although this season the upper hand they have at the game is that the other teams in the league are actually at their own worse form too which makes it hard for any team to actually challenge them even if they lose some games.
Liverpool are already the champions of the Premier League, with all confidence you can say as much, I don't really think Liverpool performance will drop this season, you can say for next season but not this season. Even a spell may probably not be able to stop Liverpool from winning the Premier League this season, reason is the goal difference, they are 67 points while the closest next to them is Arsenal with 54 points, so you can see the difference. Liverpool are passing Arsenal with 13 points but have played more game than Arsenal, so actually there is no come back from Arsenal or any other club in the Premier League.