Well, looking at those numbers (and ignoring anyone with less 100 minutes), we actually miss VdV and PEB on the PK.
And Luke Schenn and MDV, while Provorov sucks - which makes me suspicious of the value of these numbers.
This is what I thought, when I crunched those numbers.
1) Leier was useless on PK. Since a 4th liner often gets that role in NHL, or at least on this Flyers team, it's important to make sure whomever ends up there can at least do this reasonably. or get quickly moved out of the role
2) Raffl and Simmonds did and do very well in limited roles. I think they simply have enough NHL experience to understand the strengths of the players they are facing, proper gap control and what they can get away with 1 man down. Younger players have a much steeper learning curve.
3) PK stalwarts Couts and Provy suffered hugely from the overall team inability. They're the huge PK minute eaters. I don't think that anyone thinks they're not competent...but it's worth watching their minutes, as they both lead the F and D corps in overall TOI too, so if they need some more rest...get them rest. Can also be achieved by reducing PP time. My first thought is Provy issimpoly not needed on PP2, he looks awkward out there and there are other players who can take his role leaving him to other roles...time to grow up and understand Ivan cannot do everything, and doesn't even need to.
4) PK dee rotation is simply whomever is available, minus Ghost and so far Sanheim a bit. Nothing wrong with either of them getting time to see how it works out, need to limit Ghost's time as he already eats many minutes...but reducing PP goals against by even 5 goals is probably worth 2.5 points in the standings, and well worth a lot more experimenting. Hagg better be better again...he'll be out there a lot