Diatomic
Mitch Matthewlander
You're being a bit misleading here. Marleau entered the NHL full time as an 18 year old. By the time he was Kadri's age he was on his fourth 20+ goal season, with a 28g/57p stat line that year.
I think Kadri still has huge upside that he hasn't reached and that he's already our best center, but his development curve is a tier or two below Marleau's and I'm not sure he'll be the star 1C we've wanted since Sundin (I see him as a weak 1C or very strong 2C). But there have been teams that have won the cup without a star 1C, so I'm not too worried about it.
By the time he was kadri's age he had 300 games of NHL experience and had cemented himself as a top 6 forward, Kadri is still getting shuffled in the lineups to this day and people still insist on having him on a 3rd line center role.
Yes Marleau has 20g seasons but his overall production was not good. I'd rather take a 15g 40a 55point player than a 20g 20a 40 point player.