jiggs and pac at least connect most of the time, lucas needs to be moving straight up(no left or right) and hope the opponent isnt moving down to have a chance to connect all the hits :/ why make it multihit if the hits dont connect, id be fine with making it come out 10 frames later if at least all the hitboxes connected properly, if this was intentially done that just makes it worse, if they dont connect, i dont see how you can say it functions perfectly :/ since you say it isnt meant to sweep people into the air, fine, but what is it meant to do? are you meant to hit people with only the very last hit, which comes out on frame 34, to use it to edgeguard/spike people with?
uair well i guess you can say its being salty more than anything really, ness gets to keep his busted hitbox from brawl despite already being the better character, yet lucas' get nerfed so much that its basically unuseable in anything outside of combos and sometimes juggles. this hurts especially because it was one of his options in neutral in brawl and they nerfed it and all neary all his other options in neutral(only pkfire and zair now) make of it what you will, but unwaranted nerfs never make anyone happy so i guess u can say im just salty about it(especially if you consider all the other "nerfs" he got).
fair, no the issue with the hitbox isnt the reach on it(though to answer your semi question, that actually matches the hexagon pretty accurately) its when it comes active, its the same issue that ftilt had before this patch which they fixed. the best way i can think of to Replicate this is to input the fair shortly after reaching the apex of a shorthop and fast falling it :/ the hexagon visuals come out before the hitbox does, its great when you see the visual hitbox come out inside your opponent yet they dont get hit and punish you for it.
nope usmash at the ledge doesnt link and since the tooltip says it does(and it did so in brawl too) i cant say it functions perfectly in the sense of intended use, and its not about the 2 frame, its about hitting people that have lost their ledge invincibility, i agree that dsmash is a much better option to punish the 2 frame.
as for dsmash, yes u can drop shield, because the first hit pushes the opponent so far back the other 2 hits dont connect, so it wouldnt break a shield unless they purposely run back into the move and put their shield back up...
as for the video, since someone mentioned it, yes even i thought certain things were overexaggerated(like the pkthunder on stage part for eg.) but sadly that doesnt make the other things pointed out in the video any less true