The big question for me is the structure.
Klopp would be an excellent choice, but he's never had responsibility for the one aspect that requires the most work in order to fix the mess we're in - recruitment. Are we going to appoint a DOF at the same time? If so, who is it going to be? What changes are to be made to the transfer committee/scouting setup?
It could all go pear-shaped very easily, this, even with the right managerial appointment if we don't appoint at the same time a recruitment team that can get the right players (and get the right money for the players the new manager wants to let go).