It's a pointless question.
Only a footballing idiot would think he isn't good enough to contribute to the squad over the second half of the season so the only non-idiotic answer, in footballing terms, is "yes". However, if there is a problem in his head/attitude with him not being a guaranteed first XI player (or indeed any other off-field problem) then we may be better off cashing in and getting someone else.
So the real question is, "Does Jason Puncheon want to come back?".