They're still wily, experienced defenders, even if they're a long way from top players. Most PL defenders are physical and little else.
I was more referring to Ajax with the ball not being what they were last season. They were, in my opinion, held together defensively by De Ligt for most of those Champions League successes--and even then they wete ropey. Schone and De Jong were very important to their midifled play in the CL last season, in my opinion.