I think there's value on United with or without Jlinz or Martial.
I expected Chelsea to be slightly favourites but not by that amount.
Chelsea have been showing signs of downing tools lately and I don't think a tight win against the mighty Malmo in the Europa cup suggests otherwise.
I expect United who now see themselves out of the CL will give the FA cup a good go, more so OLE who would probably seal a deal as United manager should he reach the final.
I expect United to put up a good fight here albeit their relatively poor form when they play at the bridge and if they do, on recent form I don't see Chelsea matching them.