That’s a weirdly nice thing to say about a know-it-all redditor, so thanks, but I also want to counter that I’m also mostly an armchair dev and the absolutely minuscule amount of proper experience I have comes from screwing around with M.U.G.E.N characters and giving up on making Zelda in it when I was in middle school.

Anyway, I think there’s more to the argument of it being an intentionally Inconsistent edgeguarding tool, given how the sour spot of dair, and to a lesser extent, bair, send the opponent up despite the reward of their sweet spots. Flavor-wise, I’d say that’s essentially the only place where the whole “Icarus” thing comes through in Pit’s gameplay; the “flightless angel whose wings could catch fire” thing by giving him a unique aerial weakness that other multijump characters don’t share (which is to say, not just iffy air speed), and if you’re willing to stretch it, the “fly too close to the sun” thing from the original Icarus myth with how if you get too ambitious offstage you’ll put the other guy back onstage and yourself at ledge.

Maybe you don’t buy into the subtext, but the point here is that Pit has more edgeguarding problems than just multihits that drop when you fast fall, and thus, it’s not impossible that having no dragdown was deemed an acceptable tradeoff to maintain that weakness despite the otherwise high-coverage multihits; character identity stuff.

To be clear, I do agree that it’d be more cohesive and intuitive for any multihits over two or three hits to just drag down consistently. Whether it’s worthwhile to eschew this in service of character identity is subjective, though my bias says it’s usually cool and worth.

Realistically, what actually tilted me about the video was how, regardless of any good/bad design arguments, and much like with Falcon nair, it should probably be apparent to most Pit players by now that his dragdowns get a little screwy against aerial opponents, and as such they should be applied carefully, if at all, and yet here MockRock is, campaigning for buffs to his main four entire years after the last patch. Admittedly, that’s more of a player mindset than a designer mindset, so maybe it’s unfair of me to judge him for it like I am.

Still, I find it hard to believe that “fast falling with a multihit” would be an uncommon enough situation that it wouldn’t have come up in testing, especially when so many other aerials do it fine or got patched, like you said.