As a forward heading into his 30s, I really doubt he can keep his production up even at the PPG pace (forget the 99pts season, that's not happening again). Heck, he isn't even PPG right now (but apparently, not producing is a compliment to his play according to him.) Our PP is good, he has been moved back to wing to decrease his responsibilities, he is still very bad defensively, and is now pacing for less than 70pts. That is not a $8M player.
Also, I'm pretty sure during the North division, JTM was already giving up on plays. I specifically remember Holtby giving him the death stare for just letting Matthews goes in alone uncontested. He has always been a problem, it was just his counting stats hiding it from criticism. Things are only going to get worse from here on out, barring some sort of attitude and work ethic change.