I think he's just in a different place mentally right now, winning b2b cups probably does that.
He used to be the model of consistency but since opening night of 17/18 i've seen a lack of effort from him more than ever.
Kind of a reflection of the whole team, they seem to need a proper kick in the ass before the team plays their hearts out, and sometimes even more than one kick.
I mean these days it feels like when the Pens play against a non-playoff team you almost want to bet against them every time
Not like the old days when you could expect 3 point nights from Sid against bad teams.
And as far as the individual stuff goes, i wonder if McDavid's play has sort of taken a piece of Sid's competitiveness. He probably realizes he can't match his numbers and there's no award for being #2.