The fact that this is the concern tells us everything we need to know.
A goalie really on their game in the playoffs should not be a hurdle that this team can't jump over. That isn't a Skinner issue to solve, that's a (purportedly) one of the best scoring teams in the world problem to overcome.
Similar to last night, if Skinner has a quality start, but we finish absolutely nothing, that is not Skinner's fault. If we go into a playoff series and Skinner plays well, but we lose the series because we can't cash more than 1 or 2 per game, that is not Skinner's fault.
The goal posts get constantly moved here as it pertains to him. First it's SV%, then when SV% is fine for a long stretch and the majority of the season, it's "full season" stats we have to look at. Then when those start to improve, it starts to become his fault that the group in front can't finish anything.