Klopp doesn't have that reverence of the Spanish big 2 like Poch and almost all football people from the Latin countries seem to have and a lot of powerful football people from other places as well, just not to the same degree. If he wanted to he would have went there before Rafa in the summer of 2015. But mostly he likes working with players with manageable egos. He by all accounts was the first person who wanted Coutinho gone after his desires became clear. No desire to manage his ego at that point. Poch has shown no such issues.
We'll see though, could be a misread on all of our parts.
Kloppo has no problem with egos, he managed Robert Lewandowski and Mats Hummels, 2 massive egos, not only coached them, but is friends with them to this day.
It's more that he can't speak Spanish for one thing, he always said when he was in Germany that the only other place he wanted to coach was in the prem, cos he liked the league but most imporant too - he has to be able to speak to his players!
And then of course, the most obvious thing for anyome who has followed his career - they are the opposite of what he looks for in a club. If you could pick a club who seems wrong for him, it's them, along with the plastic clubs like City and PSG.