He's definitely legit. It takes a bit of hockey/game understanding to see what he truly does well because he isn't physically over matching guys or just blowing by guys. He makes all the little plays and has more than enough tools to be a great NHLer.
Your post made me think a little (from a Sharks POV), and I decided to troll through the old
William Eklund thread before we drafted him 7OA in 2021. Controversy inbound (mildly)...
There were a LOT of people posting that Eklund should go top 5 in the draft, even some stumping for 1OA, calling him "the next Zetterberg" etc. Now, sure, he may end up there, and we're only 3 years out from that draft so it's still a bit early to evaluate. But I'm getting the same vibes with Catton. Extremely high IQ, a bit of a 2-way game (although some knocks on Catton's D-zone), "does all the little things right that project to the NHL and you have to be a bit of a hockey genius to understand," and a slightly undersized FWD whose "floor is as a 1st line scoring winger."
The Sharks boards are pleased with Eklund's development, he's pacing for 40 points in his first full season and he's even starting to play C with promise, but I think it's quite reasonable that he went 7OA and would have possibly been a bit disappointing if he had gone in the top 5. I doubt that CBJ would redo their Johnson pick, I doubt Detroit would redo their Edvinsson pick, definitely not NJD with Hughes, definitely not Power/Beniers/McTavish.
I'm sure there are a million ways to parse this out that Catton believers will say "bad comps / wrong / they're super different / etc" but at a high level, you generally see HFBoards *slightly* overvaluing a really highly skilled but slightly undersized forward. Catton seems super legit and he seems to have a bright future in the NHL but in the end, I'll be surprised if he's picked in the top 5, probably a happy pickup in the 6-10 range, just like Eklund was.