I think people wildly overplay how much Jack actually drinks due to his parade antics. I highly doubt he's doing a six pack of Stella in every night after training. He's a player who needs to keep ticking over to maintain top form and has had too many little niggles, a burglary and more competition for his place. Jack proved last season he can be an integral part of the team but at this level you have to keep on proving yourself again and again. I agree with the poster who compared his situation to Stones' a few years ago.
Jack needs to decide whether he's happy with his medals and picking up a wage or if he's ready to take that next step and be an elite player who sacrifices everything to be the best he can possibly be.
I hope he can come through it stronger because I think he's a sensational player who lets us dictate the tempo of matches. His strengths patch the weak parts of Peps system and he's been admirably selfless in how he has sacrificed the more flashy aspects of his game to help the team. If he's not up for the fight though, Oscar & Jeremy want his shirt and will rip it off his back.