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.
Maresca is a newcomer to the Premier League, despite having previously worked with Pep in Manchester City. Maresca has never felt Pep's pressure as a manager of a big club like city. This is similar to when Chelsea decided to sign Potter from Brighton.
The quality for the Premier League is clearly greater than that of the Championship. I recall everyone hyping Burnley once they returned to the Premier League and went back to the Championship. The competition in the Premier League is extremely tough for a new coach coming from the Championship.
I believe Maresca will not be at Chelsea for long, and he may face numerous challenges as a head coach. And, once again, Todd Boehly has burdened him with a large number of inexperienced young players.