If Grabner doesn't play, it'd be a huge mistake. Nash needs to be away from top PK unit. We signed Grabner for his PK and to let Nash focus more on his offense.

as an islander fan, this looks like a solid lineup, and yes grabner needs to be in the lineup for special teams,

That lineup is what was reported as the lines that are skating together today in practice. Yes that means Grabner is the 13th forward. Nash also isn't skating on the PP1. It's McD-Pirri-Kreider-Zibanejad-Buch. Klein is still sitting out with back spasms and is listed as day-to-day.

Is Nash on PK1?

No idea. They only tweeted about the line combinations and what they had set up as the PP1. No idea even about PP2 or PK.