If we had Sid, Geno, Letang and PH in their primes, it would be much less of a risk to get rid of your PPQB, obviously. But don't act like putting our aging stars out there guarantees the same success it did seven years ago. Even back then there were plenty of down years on the PP.
The supporting cast needs to get stronger every year from now on, not weaker. And the stars need to get more team-oriented moving forward, not more stubborn. If you look at a player like Yzerman, he wasn't good at all defensively early in his career, but after 15 or so years in the league was winning a Selke, working hard at being dominant at faceoffs, etc etc. He was 33-34 when he won the Selke, just like Geno is now. I won't hold my breath on that one.
We either need way, way more from our stars, or else we need way more talent around them. Dumping Phil just for the sake of change is going all-in on our stars to carry the team on the PP and at ES unless we're darn sure we can snag Zucc or maybe Eberle, and get lucky that those players fit in, stay healthy and perform.
It may be necessary to dump Phil if he is being uncooperative, but it reduces your margin for error in any future roster decision.