So , the title would have given you a clue on what I am going to write. If you had noticed , Oscar Emboaba has created very little and that is not acceptable for a number 10. To counter this ,what I suggest is , moving him to a deeper position against the weaker teams who "park the bus" and employing a 4-3-3 with Matic as the DM and Luiz/Oscar/MvG/Ramires as the 2 advanced midfielders. And , playing 2 holding midfielders against the weaker teams makes no sense, too. This formation makes it easier for us to break down teams like Crystal Palace and we can even employ it in the odd match against stronger teams as well. So , this is how our team will look like next year with a 4-3-3 :
Cech
Brana Cahill JT Dave
Matic
MvG Oscar
Willy Haz
Costa
Tell me how do you think 4-3-3 will pan out !