Not going to be a popular idea, but here it is:
Do modern NHL teams need two #1 puck moving defenseman? My argument is no. That is a waste of assets. Let's take a look at the 1 and 2 defenseman of Cup champs.
2024: Montour ran the power play. Forsling, OEL, and Ekblad have a strong case each to be the 2.
2023: Pietrangelo ran the power play. Theodore was the 2.
2022: Makar ran the power play, Toews was the 2.
2020-21: Hedman ran the power play, Sergachev was the 2.
2019: Pietrangelo ran the power play, Dunn and Parayko have a strong case as the 2.
2018: Carlson ran the power play, Orlov was the 2.
2016-17: Letang ran the power play, Schultz was the 2 in 2017. Really not a 2 in 2016 for the Pens.
2015: Keith ran the power play, Seabrook was the 2.
2014: Doughty ran the power play, Voynov and Martinez have cases as the 2.
2013: Keith ran the power play, Seabrook was the 2.
2012: Doughty ran the power play, Mitchell, Johnson, Voynov, and Martinez have cases as the 2.
2011: Chara ran the power play, Seidenberg was the 2.
2010: Keith ran the power plan, Seabrook was the 2.
2009: Letang ran the power play, Goligoski and Gonchar was cases as the 2.
2008: Lidstrom ran the power play, Rafalski was the 2.
2007: Niedermayer ran the power play, Pronger was the 2.
2006: Kaberle ran the power play, Hedican was the 2.
Since the lockout, teams increasing left the older model of running a power play with 2 elite defenseman and went to 1 defenseman at the point operating a 1-3-1 or a variation of that set up. The team requirement was to have one elite power play defenseman and then a second defenseman who could run the second team.
A decent litmus test would be to ask these questions:
"Would I trade for an upgrade for the #1 PP defenseman? Would I be comfortable with my #2 guy running the #1 power play? Am I comfortable with my #2 D running my second power play unit?"
If you answered no to the first question, you have your guy. If you answer no to the second question and yes to the third question, you've also probably got the right #2 D. Aside from Sergachev, few of the recent cup winners have really good #2 defenseman who can run a power play at a top level. No one is looking to upgrade from Makar, Hedman, Letang, Doughty, Keith, etc. But teams would upgrade from Forsling, Towes, Dunn, Schultz, Martinez, etc. if that D was running your top power play.
Apply that to the Sabres. Does anyone think we need an upgrade on the #1 power play from Dahlin? I think that question is a definitive "no." Would everyone be comfortable with Power running the #1 power play? I think that answer is "yes." Would anyone be comfortable with Byrum running the #1 power play? Ehh.... but you'd be looking to upgrade. Would everyone be good with Byrum running the #2 power play? Absolutely.
I have no issues with Owen Power. I think he's a heck of a hockey player. But if you remember, I advocated for taking Matt Beniers over Power during the draft year. Part of that thinking was having two elite #1 defenseman is a waste of assets. Power needs to be running a #1 power play unit. He's that good. But so is Dahlin.
The Sabres could use more defensive-minded defenseman, another center, and a net front presence (when your best two net front guys are Benson and Zucker, you need more). At this point, I'd use Power as the trade asset to adjust the roster.