More than anything we need to do whatever it takes to make sure we rid ourselves of the cancerous influences of Ozil, Xhaka and Mustafi in January. Cut them loose. The sooner we do that the sooner we can get to where we want to be.
Obviously it would be nice to get some reinforcements in as well especially in the shape of some much needed creativity, but getting rid of certain bad apples should be the absolute priority for this team and manager to move forward along the process. Addition by subtraction.