meh I have several issues with that data.
I challenge the notion that league is “better” because scoring is up. 19-23year olds struggling/producing less isn’t indicative of a better league. It’s more indicative of a diluting talent. 2 expansion teams + 2 AHL teams means more jobs that have to be filled which contributes to having more less talented players being able to find jobs.
19/23 year olds struggling is also indicative of a rather weaker crop of players coming in. This usually fluctuates every half a decade and it’s been happening since the 04/05 lockout. Guys like Crosby, Kane, Malkin, Ovechkin, Tavares, Stamkos were stars right out the gate. This particular era of players succeeded in a low scoring era. Between 2010-2014, talent coming into the league and becoming stars right off the gate was staggering much like what we see today. The state of the league hadn’t changed much, scoring was more or less the same, but we saw a very poor group of high end talent in coming and those with that potential taking more time to get there. Mackinnon, Kucherov, Draisaitl, Barkov, Pastrnak, Tarasenko, Kuznetsov, etc.
2015-2019, the crop of talent in the league increased significantly with the likes of McDavid, Marner, Matthews, Laine, Hughes, Pettersson, Kaprizov, the Tkachuk’s, Makar, Barzal etc seemingly producing right out the gate. Scoring was on the rise, and so was talent. Since Covid, scoring went up significantly further but the crop of talent post Covid has been severely lacking yet again.
When you look at why scoring went up, it’s easy to see that there’s actually a diluting of talent in the NHL. 2 expansion teams + 2 AHL will do that. While there are exceptionally talented players, them being talented purely based on skill alone and that affecting scoring is actually a matter of the league itself decreasing in quality.
As for crops of talent coming into the NHL and making an impact, there really isn’t a direct correlation between that and scoring impact of the league. What you’re seeing is simply just a fluctuation of good talent coming in vs weaker talent that occurs every half a decade.