With Marvel's January 2017 solicitations now released, it looks as though A-Force, Mockingbird, and Agents of SHIELD have all been quietly cancelled.
Newsarama recently ran an article discussing A-Force's status but couldn't get official word from Marvel as to whether it is officially cancelled or just on hiatus.
No new issues of A-Force or Mockingbird have been solicited past this week's issues #10 and #8, respectively. Nor have any issues for Agents of SHIELD been solicited past issue #10 due for release at the end of this month.
UPDATE: Writer Chelsea Cain has confirmed via Twitter that Mockingbird has been cancelled with this week's issue #8 being the last.