After winning the title last year, they must have taken the Champions League and Premier League title more seriously again. Their signings so far haven't been bad. If they can add Alexander Isak, Liverpool will remain a serious contender for the Premier League title. Amongst strong teams like Manchester City, Arsenal, and Chelsea, Liverpool has the potential to win the title again. Jota's devastating loss has forced Liverpool to recruit players in that area. Arne Slot will now be the team's catalyst for a cohesive team. If he can achieve this, they can win the title again.
I don't really think all these signings are to prepare for the champions league rather to stand their ground as League contenders because one reason they got the league last season was because Manchester City was in a terrible form but this season they have strengthened theor squad and for me seems more like the EPL title favourites because they are the most consistent among every other teams.