I think I'm at risk of veering off on a tangent, but there is so much that is different between not only the game as its played today, but also how players are developed.
Kids are on the ice almost 12 months a year now and they certainly have developed into better athletes and skaters as a whole. However, from an early age, structure and systems start to play a big role at the upper levels.
Kids back then (myself included) put their hockey stuff away in april and picked up a soccer ball or baseball bat. However, we all played countless hours of street hockey and shinny where there was zero structure - you had to learn to play creatively off the people around you. I really think that it was that creativity that brought a lot of the offense we saw back then into being.
A few summers ago a group of guys I sake with were short a goalie and a few bodies. I agreed to play goal (even though it had been a while) and then I learn that one of the guys was bringing out his kid and some of his friends (15 and 16 year olds) - all guys that had been drafted into the W, and one was a VERY high pick. I thought "great, I'm gonna get lit up by a bunch of kids".
Turns out, none of them could figure out how to play with the older guys, most of whom had played a high level of hockey themselves. They wanted to dump and chase and cycle down low in shinny. I think maybe one kid put one past me. Take away their systems and they were lost
I'm not going to doubt your ability. But I will call into question how good those 15/16 year olds were haha
A few of my buddies got drafted into the Dub at that age. Not a single one played a minute of professional hockey. Most of them were barely good enough to stay in the Dub. I'd like to see your shinny team go up against a 15 year old Bedard or Dylan Guenther or Matt Savoie.
Then I'd be impressed.