nice. let me start speculating!
i am extremely happy to see that ZAR-Kampf-Anderson line. That means Keefe is thinking of Kampf on the "4th" line - though that's not some crappy 4th line that'll be a rare 4th line that he thinks he can use against top matchups and with heavy dzone starts. Anderson deserves a look there though when Engvall is back I imagine Kubel goes down to that 4th line or Engvall goes there to make it a true checking line.
I am surprised to see Kerf at C at first instead of Jarnkrok - I owe someone here an apology but I forget who. was it Dekes? Obviously Jarnkrok up on the top line isn't going to be a thing but him getting a look in a true scoring role right off the bat is interesting.
And Robertson-Kerfoot-Kubel(/Engvall/Jarnkrok/Nylander) would be a 3rd-line caliber line but could be used in more offensive situations than the Kampf line.
All in all that ZAR-Kampf combo right off the bat makes me happy - that move alone kind of unlocks the entire lineup.
#1: Bunting - Matthews - Marner
#4: ZAR - Kampf - NAK
Those two set in stone would be nice, and would be our toughest competition matchup lines.
and then #2 and 3 are any combos of Tavares, Nylander, Robertson, Jarnkrok, Kerfoot, Engvall which work best, with both lines able to be used in easier usage than the other two.
though now that I think of it, Engvall over NAK on that "4th" line would likely make that line even better defensively and more effective against top matchups.