To be honest, I didn't know Arne Slot before. But that's not a problem in my opinion because I personally don't know many coaches apart from a few names that often appear in the sports media. But we can't expect Klopp to gain momentum. Liverpool have changed to a new coach and I think it will take some time before they get momentum back. I doubt Liverpool will be one of the favorites in the UCL next season. I didn't expect much from the first season with Arne Slot. It's not easy to regain momentum in your first year.
UCL favourite that ihave come across in recent time don't have Liverpool amongst to four teams and it's very obvious and clear that it's due to the fact that they are no longer having klop as their head coach as they had before now, I believe that Liverpool will still get back to their form since they still have . most of their players staying back but then it will only take them some time to get that done.
By this it becomes very clear how much a coach can mean to a team, klop meant a whole it to Liverpool just like guardiola and Areteta mean to Manchester city and Arsenal, another have to be Leverkusen, if they have xabi moving to another team, they are obviously going to have some challenges in the team but then they will try to see how well they can cope with their new coach actually. The UCL has always been very popular because of the level of competition it's been known for over the years but then Liverpool will try their best and I believe their new coach will be able to build on the legacies of their former Coach.
In the champions league they may not come out the best or even appear like one of the best but they still can get to the point where they will be able to still contend well enough amongst their equals in the champions league as at this point they can't be considered a mediocre or an underdog just yet