or the more likely explanation...he just isn't that good.
This does have an eerily similar feeling to it as the Zadina saga as it came to an end. Guy thinks he deserves more of a shot than he gets, looks for a fresh start or respect or whatever he really wants, will get it, and the new team will experience the warts and not much will change in the player's game. By average TOI, Zadina (playing for a terrible Sharks team) is playing under 13 minutes a night. That would put him in the same ballpark as Sprong this year for the Wings. His point output (17) would be 15th best on the Wings, his goal output (7) would have him tied for 13th with Gostisbehere and Seider.
Zadina bet on himself, went to the only team who would give him a chance, has failed and likely ended his NHL career, not because he wasn't given a chance, but because of his warts of a player.
Vrana was given a fresh start in Detroit, wasted it. Was given a second fresh start in St. Louis, wasted it.
Mantha was given a fresh start in Washington, clearly never earned the trust of the coaching staff (though has been weirdly efficient in low usage this year).
Athanasiou has been the same player for 4 different teams now (has never been as good as he was in Detroit).
The fact of the matter is, Yzerman chose to add DeBrincat, Kane, Compher, Fischer, Sprong despite Berggren's supposed ability. 4 of the 5 are regulars on the powerplay. 3 of the 5 are regulars on the top two lines. These are the spots that Berggren "supposedly" is made to thrive in and can elevate because he has "elite" vision and playmaking ability.
Berggren's best case scenario as I see it is being a generic brand Gus Nyquist. Nyquist's track record in the AHL was over 120 games in duration at over a point per game rate. Berggren is around 110 games in at a combined rate just under a point per game. Nyquist made his first real stint at 24 and played really well, but as a regular with aging Hank and Pav, he settled in as like a 50 point guy. Berggren came out with his first real stint at 22 with a pace for 35 points. Largely powered by a really hot start...his first 25 games he scored at a 46 point pace over 82, the remaining 42 games was a a 27 point pace over 82 games.
And if the best you can give me is bargain brand early career Nyquist, you aren't playing in the top 6, you are at best a bottom 6 player. And Lalonde clearly has a type he likes deploying in those bottom lines. Berggren can't put the puck in the net like Sprong or Fabbri, he doesn't compete as hard as Veleno or Fischer, and he can't matchup as well as Rasmussen or Copp. Not to mention there's already more bodies than spots on the PP and anyone he might replace would take away from the PK.
He needs to go to an offense starved team, he might carve out a career as a very good player, but I would be absolutely shocked if an NHL team he plays a top 6 role for ever wins anything of substance. He just is far too niche of a player at this point. Not to mention all of his supporters sound like MBH gushing over Athanasiou's per 60 metrics. At least Athanasiou was doing something in the NHL when MBH decided he was the equivalent of Gretzky's offspring.