Klopp is already a legendary coach for Liverpool and I think his performances will be hard to achieve once again in the near future of the club and that's why I do not expect Liverpool to perform as high as they did in the last years. Sure , they will fight for top 5 without any doubts but fighting for EPL title will be very hard for them as long as they don't make important transfers and when it comes to UCL , I think winning it it's already impossible for them. However , like you said , the start of the season should give us an idea of what this new Liverpool is capable of.
Next season we will look back at Liverpool playing in the Champions League after this season they are absent, Liverpool journey this season did not go according to the expectations expected by Klopp, the Premier League trophy, the Europa League and also the FA were all lost without them being able to achieve a single one, Klopp farewell of course was not accompanied by a glorious achievement after he had an impressive season with Liverpool so far, Next season Klopp position has been officially replaced by Arne Slot, so we don't know yet how Liverpool next season will be better or they will still get worse like what happened this season, the arrival of Arne Slot certainly makes Liverpool fans have high expectations for him next season.
Klopp ability of course we cannot doubt but at the moment I think Liverpool fans must be able to support Arne Slot to do his job at Liverpool next season, so far Arne Slot has had very good experience in the Eredivisie league with Feyenoord but I have not found any achievements and also his experience in bringing the team in the Champions League, So we should look forward to what Arne Slot can do next season to bring Liverpool to be better, especially in the Champions League.