Are you trying to mock Chelsea and their fans or you're serious asking this question? 
Chelsea itself is not dreaming of being in the top four of the league table this coming season talk more of others. For someone to think Chelsea would finish in the top four with their recent condition is a fantasy. By the way, I see Conor Gallagher as average player as well but for Chelsea to allow the youngster to leave is the greatest mistake they would make this season and it would definitely affect them. Everything they are doing now is to maintain their position in the mid table and not get relegated.
Chelsea itself is not dreaming of being in the top four of the league table this coming season talk more of others. For someone to think Chelsea would finish in the top four with their recent condition is a fantasy. By the way, I see Conor Gallagher as average player as well but for Chelsea to allow the youngster to leave is the greatest mistake they would make this season and it would definitely affect them. Everything they are doing now is to maintain their position in the mid table and not get relegated.The team you least expect good thing from in a season most often do turn out well and have good performance. Maresca might be different from other people, remember it takes one person to change everything about a club, it could be the coach, it could be one good striker and it could be a goalkeeper and they are doing everything to be in a good place, if everything are put in a place Chelsea might just be that team you don't expect to see this season.
I honestly feel pain for Chelsea, this is going to be their 3rd season without qualifying for the Champions League, this means that they failed to finish at the top in the Premier League for the 3rd time in a row and if they don't do it the season, 4 season will just pass without finishing at the top. It's gonna be a history for me because I haven't experienced such before.