If you look on the LFC website you'll see the vacancies regarding the first team: Physiotherapist, Physical Performance Coach - Strength and Conditioning Lead, Set Piece Coach. So it won't be all Slot's picks, in fact the way we seem to be setting up now, Slot won't have the same free rein that Klopp had. They've built that into his job description.
I think we're seeing two extremes in opinion here. One being concern because the new lad, Peeters, has only worked in Holland and two being, he knows how the human body works and that doesn't differ (paraphrased). I've already said that I'm sceptical about Slot's appointment. I will back him and wait and see just how good he can be. It follows that I'm also concerned about the rest of the staff coming in whether they are his choice or the choice of Edwards and Hughes. I'm not as concerned as you appear to be but I do see your point.
The PL is the most intense league and on top of that, Klopp's teams are known for intensity being a trademark. While Peeters may well know his job, he's never had to factor in the intensity required and while Solid says physiology is physiology and differing intensity doesn't matter, I disagree. I think that in the same way players coming into the league aren't expecting the huge leap in intensity, the fitness and sports science bods coming into the league won't be expecting it either.