I don’t see how it’s outside of relevant discussion to discuss him compared to other potential picks.
Not like the Ducks needed to take a center to begin with. It was also controversial that he was the center they picked. They had the first choice to make in the draft. He’s had a good D+1 if you take his season in a vacuum, but given how stacked of a draft it was all the teams drafting in the top 10 will be on alert to make sure they didn’t draft the second or third line guy as opposed to the potential superstar.
You're not going to prove Anaheim made a mistake picking Leo over Michkov until the latter starts playing in the NHL. You can make all the comparisons you want but it's not going to change that production in a D+1 year at age 18 is rarely indicative of a failure to find success as an NHL star in the future. A lot of factors, many outside the young player's control can affect an 18 year old's first year of NHL play, not least of which is that usually a young kid making the NHL right out of the draft comes into the league on a team bad enough to draft high to get them.
By way of more examples here's some notable18 year old seasons inclusive of Barkov:
Mark Messier: 75 gp 33p (36 point pace)
Stamkos: 79gp 46p (47 pt pace)
Stutzle: 53 gp 29p (44 pt pace)
Pastrnak: 46gp 27p (48pt pace)
Barkov: 54gp 24p (36 pt pace)
G. Howe: 58gp 22p (31 pt pace)
J. Hughes: 61gp 21p (28 pt pace)
Guys like Bedard, Gretzky, McDavid, Crosby, MacKinnon are the exception. Not the rule.
Now, that's not to say Carlsson for sure will reach the level of these guys I listed (definitely not the generational guys barring some miracle) I can't predict the future. But the idea that Leo's early production is indicative of a limitation on his potential such that Anaheim made a mistake picking him over Fantilli or Michkov completely ignores that: 1) Leo plays for an utterly inept team offensively and defensively (Ducks are second to last in GF and SOG/GP, and would probably be lower if you counted the last 3/4 of the season); 2) he plays with two players that he has little to no chemistry with (including Troy Terry who is very much a puck hog); 3) the kid has suffered three fairly significant injuries in one season; 4) he's still adapting to the pace, size, speed, schedule, and rink size of the NHL before reaching (American) drinking age.
And it also ignores that there's nothing to compare Leo's production to as Michkov is not in the NHL right now and Fantilli's season ended due to injury.
Could he have performed better? Sure. But I don't think the fact that he didn't is proof that he won't.
And in any case, you're on the first or second page of this thread casting doubts that he should be seen as anything special based on performance at the U-18s so I feel like you're looking at base stats in a D+1 as a confirmation bias device instead of giving any credence to necessary context.