Well, re 2, I'll disagree with you there. It makes sense to play Phil on the third line to spread the offense out, as Sully would like to do. Haven't seen much to like in the Sheahan-Phil combo to date. We'd be a better team with a 3C who's a better offensive center there and I'm not saying anything that JR hasn't already said himself
Actually all Rutherford has said on this, is that he'd like Sheahan to score more. What's weird about that, is he's on the exact same ES goal pace that Bonino had (7.8g in 15/16, 11g in 16/17 vs RSs 10g pace).
I get that. But Guentzel as the 3C and pushing Sheahan down isn't proof that our 3C was lacking before, just that our overall center depth isn't deep enough. In order to prove that Guentzel is better as the 3C then Sheahan, you'd need Rowney (or a similar center) playing 4C and Sheahan not playing. BC the second Sheahan is there, you're no longer putting all the defensive weight on the 3C (like what happens when Sheahan plays that role), but are spreading it out on both 3/4C. Unless of course Sheahan is the 4C and Guentzel is the 3C, then Sheahan gets all the defensive work and Guentzel gets a free pass.
In the last 2 games Sheahan had a 21% zone start %. Guentzel... 100% zone start. Despite that, Guentzel had a 50% SAT. Sheahan? 46.5%. Looking up their faceoff numbers, it looks like this:
DZ / NZ / OZ
Sheahan: 22 / 9 / 3
Guentzel: 1 / 9 / 5
4 games:
Sheahan: 45 / 16 / 8
Guentzel: 2 / 10 / 7
Guentzel there, also forced Crosby to take on a bigger work load and starting more shifts in the DZ. Last 4 games he was at 44%. His season average is 60%.
I'd look at a bigger sample size, but I'm not sure when exactly Guentzel started playing 3C. I know Rowney got hurt in the Det game on 12/31. If you figure that Guentzel played 3C since then, the numbers stay pretty consistent with that above. Sheahan takes on an even bigger defensive role, as does Crosby. Guentzel still has a 70% zone start % and a 50% SAT percentage.