If Arne Slot does not have good experience in coaching, it will be difficult for him to maintain the standard of the team the way Klopp left it because the club will be too big for him to manage those players. In the beginning we might not see it because the players already have a game pattern that the are used to which Klopp taught them. It will survive them next season but as time goes on Arne Slot will not be able to get good results because it is not from him.
On the other hand, he might learn as he is coaching them and improve his knowledge on how to improve the team performance. It will be a difficult task for him next season but let's see what he gat.
So far we cannot predict how Arne Slot will bring Liverpool to compete in the Premier League but basically Liverpool management must have considered this decision, Arne Slot has no experience in the Premier League and this may be the reason why some people doubt it but we can't underestimate him because he had good statistics while managing Feyenoord as runner up in the Eredivisie with a record of 2 defeats from 34 matches.
Several rumors say Arne Slot will replace several main players at Liverpool, especially older players and this coach usually prefers to play young players well, tactics like this are interesting if applied in the Premier League it's just that we can't get our hopes up in the first season because it is not easy to adapt there.