While I don't really want to speak about the qualities of players Chelsea are currently going for from the fact that they have spent millions for under performing players based on the price they were bought and expectation from them, I will wait to see these players perform before criticism though it's Ironic as they are not going for experienced players which has been something lacking in team more especially from the fact that Silva is out now.
What worked for Maresca in the Championship may not work in the Premier League, and his decisions may not be the best either. And it’s not worth comparing the experiences of Maresca and Pochettino, I think they have very different levels, but Chelsea decided to take a risk. Perhaps the winning mentality is important for them, if Maresca knows how to win, even in a lower league, then he will strive for this in the Premier League.
It is important that we begin to understand that winning is not 100% based on the coach. You can hire the best coach in the world and give him some dumb set of players, he will achieve nothing. This is a pointer that the problem of Chelsea does not lie on only the coaching and the management. There should be a probe into the scout department of Chelsea. Who recommends the players they buy and the price they pay for such players. Do they have the short-term and long-term plans for the club in mind before making such decisions have buying such players. Chelsea will keep falling if they keep thinking that their problem is only on the coaching side. That club need a total overhaul, both from the management error to the players weakness. Although I am not an experienced analyst but I am talking based on my mere observation of the club. But it is quite unfortunate that the club management only thinks that the problem is coach. If they have looked a little beyond, they would have kept Pochettino for one more season.