Coentrao is available and if bertrand and/or Kalas(loan) leave hen he'd be good on a short term deal.Something like loan with option to buy at the end of the season could be useful.
I actually think KDB would fit in Jose's current system really well and I think Mata will not stay beyond the summer so KDB still has a shot but like you said KDB has to get his shit together rather soon.
http://www.theguardian.com/football/2014/jan/02/chelsea-kevin-de-bruyne?utm_source=dlvr.it&utm_medium=facebook Sensible from Jose imo,KDB is just too good a talent to sell right away especially with Mata struggling to adapt to the new system.I think we should loan him in January so that he can play regularly and gain some confidence and form.In the summer if Jose does want to sell Mata then KDB would be his natural replacement and if Jose does want to keep Mata then we can sell KDB whose market value should rise if he performs in the 2nd half of the season and the World cup.