Well, he actually had more assists than Sid, so to say he had "less" support is neither here nor there. Each player had eight total goals, with a combined team goal count of forty-nine goals; until game seven, every game was decided by one goal. So, technically, they had almost the exact same amount of support until game seven, when Varlamov and the Caps imploded.
OV's game is not to support others, Brian, it is to try and dominate on his own. IMO, having Semin and Greene play substantially better would not directly contribute to the assessment of OV's performance, because he is not a player who makes others around him better - this is something he has shown in each of his four years in the league. In that instance, we would merely say, "the Capitals won as a result of OV's dominance, and the help of the supporting cast". It would merely help to distribute praise slightly more evenly, and really do nothing to alter OV's individual performance. So, really, it may be better to say: "I wonder what the Capitals could have accomplished with the support the Pens have."
I have said it a thousand times: the mundane "little things" Crosby does better than OV win games; trying to weave your way through the O-Zone on a PK leads to breakaway chances, on the other hand.