Brief commentary: Hero was the subject of ban discussion about a year ago now.
The main concerns levied around Hero shifted rapidly. Initially there was genuine commentary alluding to the idea that he was broken - he's clearly not, though, for a myriad of reasons. These became obvious very quickly (poor mobility & frame data and lacking in consistent burst options or fast moves instantly dooms most characters) so the subject of discussion went from "Oh wow he's broken" to "His RNG is scary".
The primary examples of his RNG being concerning mostly amounted to high frame, high-commitment moves on par with Ganondorf smash attack speeds (see Thwack.) The apex of how silly this became was when clips were posted of Puppeh -
a player ranked 69th in 2019 on OrionRank - taking stocks using these moves against Squerk, a player that was not ranked within the top 250 for the year, at a local. Scraping an even lower barrel, clips were shared of Leffen, also a top 100 player, beating people online in Battle Arenas and/or Quickplay.
The common fear was that Hero's moves would allow him to be an upset machine, with lesser players throwing crits or Thwack or menuing magic burst at the perfect time against the right characters being hypothetically able to take down better players because of random factors. How has this transpired in the seven months of competitive play?
Well, Hero;
-Scores below 5.00 on peaks on a peaks project I posted a while back. This isn't abysmal, but 7/10 of listed peaks feature deductions relating to multimaining, several secondaries, etc.
-His main records across tournaments is middling, with an average placement score across 5 mains being at 33.72, putting him in the 40s outside of the range most would consider viable, with several characters he's ahead of having since been buffed.
-His international main usage is below 0.5%, putting him near the bottom of used characters at the relevant international level of play.
-His power rankings stats are only slightly better, making up 1% on top 3 instances, and making up a familiar 0.4% on top 1 instances (in this case, only a single instance across 250+ power rankings globally.) His overall PR usage is 0.5%.
-On the recently constructed Hidden Bosses project, only four Hero mains were used out of hundreds of mains for other characters combined. The maximum number for an individual character was 50 (no character hit this as of yet) and while this is still being worked on, the median is somewhere from 12-20. Other DLC characters sans Byleth/Minmin all outpace him in representation at the hypothetical level, including Piranha Plant, Banjo, and Terry, the last of which was very recently released for the relevant metagame.
-Most embarrassingly, out of 2072 upsets recorded across 100+ intl tier events, Hero takes up a total of 4 upsets (0.2%) meaning he scores below his representation on upsets at the national level. He has less upsets than even his representation would have you expect.
I'm not going to argue that Hero is well designed because I really think he's quite badly designed on a number of different levels. I will however say that debates about banning the character look ridiculous in hindsight as I expected them too after seeing the character's stats and actions and Salem's very, very inconsistent to occasionally poor results upon immediately picking up the character. (He would have successes with Hero - but he dropped in the rankings overall.)
I found myself embarrassed reading hostile comments towards Hero that invoked arguments his Hocus Pocus giant effect was too much RNG. I don't think I needed to have been a yugioh analyst for 4 years to explain to people that the risk-reward on Hocus Pocus is abysmal and that it's one of his worst moves, and that this amounted to complaining about Ganondorf's uptilt. Surely, I thought, people understand Smash Brothers enough to get that most of his instakill moves were actually very bad in most situations.
This certainly doesn't represent all pro-Hero ban arguments, but the insistence by pro-ban people on pushing these kinds of clips (Hocus Pocus, Thwack/Whack, etc.) demonstrates that the movement was doomed to fail because it set expectations so high that when things fell flat for Hero for most of season 2 of the PGR - particular the out-the-gate SSC/Shine, people immediately stopped caring.
This, of course, is now a great example of why pulling an instant ban trigger is a terrible idea, because bans on unimpactful low tiers is a silly idea if they can't consistently do the thing people are scared of. With Hero unable to even fill an Ice Climbers-like role, I feel as though this is the last nail in the coffin for pro-ban sentiment having any ground outside of language barrier debates. Even significant upset(s) now would need to come fast and be as high profile as possible in a very specific way with an immensely negative reaction.