This is an insightful post.
My impression with Ralf is that he is a purist at heart. Since he was at least the partial innovator of the gegenpress and the 4-2-2-2 formation, he is fully committed to it. Now, when you are building a club ethos, this is important because these by pure values filter down into many aspects of managing the club. Recruitment, transfer, academy, data/analytics, physio, etc. are all affected. His single minded focus is a great asset in a situation where he is the sporting director.
Now, why wasn’t he really successful in winning titles? Perhaps because he isn’t the pragmatist that Klopp, Tuchel and Nagelsmann have turned out to be. Also, the blend of Klopp’s pragmatism, man-management, media savvy and energy on the touchline is clearly title- winning stuff. Liverpool don’t play a 4-2-2-2, but the principles of the press and quick attack play (balanced by savvy possession) are still the key qualities of the tactics.
One more thing — it took awhile for Klopp to implement his plan. I expect the same here. I don’t believe that our players suddenly became shite, I think though, that while they are learning this system, there is uncertainty and that affects confidence.