All Liverpool needs right now is to get the right manager to take over from Klopp. I thought they were going to hire Xabi Alonso, but that deal is looking very complicated. If they get the right manager for the job, they'll continue right from where Klopp left off. That's a very big decision for them because if they fail at that they're going to be in a lot of trouble. The players will become unhappy and begin to leave.
Its going to cost them fortune to get Xabi Alonso and as of now, I bet he is a Top tier 1 coach that any team would be willing to hire. Imagine winning (almost) Bundesliga with Bayer Leverkusen against the all season dominating team like Bayern Munich then after that he pick a team like Liverpool that has alot to do for their next season after Klopp leave
He will has better chance on sticking with a top club in Bundesliga like Bayern Munich rather than taking chances for now. He still has plenty of years ahead of him if he wanted to get some challenges though