If we are going to get into what if, I don’t think enough is made of how Claude Julien used Patrice Bergeron.
Let’s look at the PP. In the two seasons before Julien took over Bergeron had 29 and then 38 points on the PP.
In the next ten years under Julien he never got above 14 points. Heck he scored 14 PP goals his last season before Julien took over and in the next 6 seasons after had 13 PP goals TOTAL. Julien’s use of Bergeron (and Marchand) on the PP during his time in Boston was malpractice.
Bergeron had 641 games under Julien and scored 463 points. This covered his 22 to 32 year old seasons. Away from Julien, 653 games and 577 points. Somehow when Bergeron was under 22 and older than 32 he was way better offensively. There are of course crazy ass concussion and Pastrnak things effecting this outside of Julien, but Bergeron was just used to extremely defensively in those Julien years.
Sadly, how the datasets are I can’t compare all of the Julien era on naturalstattrick, but I can look at 2008-2012 as an example. In those years Bergeron had more than 300 more defensive zone faceoffs than Kopitar and 200 more starts with the puck already in the d-zone when the shift began. Kopitar played the minutes of a regular #1C. Bergeron was buried like few players in NHL history. Despite that, Kopitar gave up 20% more 5 on 5 goals over those years. And these were not the bad recent Kings years, these are the years the Kings were contenders. Frankly, I don’t think it’s as close defensively as Kopitar supporters want to propose and the “what about its” should be more about Bergeron’s offense under Julien than Canadian media bias.
That being said, Bergeron was never the puck carrier in the offensive zone and playmaker that Kopitar is. Bergeron was really better when there was someone else to be the puck distributor in the offensive zone. Bergeron’s game was “defend, take puck, give to friend with big nose, get open for shots while friend does stuff, cheat to get back on defense”. Kopitar didn’t need a friend in the offensive zone.
If we want to talk about what things would have been like if these guys switched, I don’t think Marchand and Kopitar would have been nearly as effective as a duo as Bergeron and Marchand. And I don’t think Bergeron would have had as much 5 on 5 success with guys like Brown and Williams. Who knows what Julien would have done with Kopitar on the PP, but I can be sure that Bergeron would have been able to go back to scoring 30 points on the PP instead of 10 if he got away from Julien.