That’s because people simply called too many victories too early. Kosmos legitimately has everything. She has Sakurai’s xenoblade bias, the Rex cut, Namco’s usage bias, no Lloyd, Nintendo’s dlc satisfaction for xenoblade customers, constant weird leaks about her (even one from Vergeben), Lloyd’s and Heihaichi’s copyrights (which are likely for mii costumes), the formal final slot, Namco’s heavy involvement/praise on Ultimate, no Namco mii costumes, and a pretty strong, weirdly specific, connection with daisy in the dlc pic and the +1 pacman from the ultimate anniversary images, if you don’t remember, Sakurai refers to Pac-Man as “Namco’s character” in the Terry video. Seriously, it’s the list is goddamn ridiculous.
Let's break this down:
She has Sakurai’s xenoblade bias: This isn't evidence
the Rex cut: ok
Namco’s usage bias: Could have been worded a lot better but sure
no Lloyd: Assuming Sabi actually is legit
Nintendo’s dlc satisfaction for xenoblade customers: Not evidence
constant weird leaks about her (even one from Vergeben): Not evidence, seriously, where's Skull Kid if "Being on a lot of leaks" means anything
Lloyd’s and Heihaichi’s copyrights (which are likely for mii costumes): Plausible
the formal final slot: The **** does this mean
Namco’s heavy involvement/praise on Ultimate: Yeah, they were heavily involved in 4 too, only got 1 character, even Sakurai called their lack of characters out
no Namco mii costumes: Sure, but this works both ways. Capcom's came with Banjo, a Microsoft character
and a pretty strong, weirdly specific, connection with daisy in the dlc pic and the +1 pacman from the ultimate anniversary images: "She's a woman, thus all women must be the same."
Most of this **** is circumstantial at best, and your opinion at worst.