How on Earth would 7 not make sense if we've gotten 6 in one go before?
Why would they make something so massive and not spread it out to 6 each? Changing any pack no matter what would require third parties discussing stuff. It always matters. There's no way 7 would happen if 6 each wasn't going to happen for multiple characters. And considering people believe the Hero pack was going to have Geno and Chocobo Hat, which are actually logical ideas(but since it involves one company, it's pretty easy to negotiate it so you can release them at a later time. Whether it's for Premium upgrades or otherwise), that'd only leave one pack with 5 costumes at best. The packs are pretty spread out overall. You have only one oddball pack, and there's a legitimate reason for it to have at least 6 instead of 4. There's no legitimate reason to believe any pack would have 7 to begin with.
And I stand by the fact that it's a really big one that requires 0 stretches to work. We both agree that it's fake so let's just move on.
It's a stretch to believe, when we only know presentations were all made at once, that it has to happen to justify a leak. That's making up way too much for anyone to believe it. It's not really at all logical with zero evidence to suggest it. That makes it a stretch if you need to justify it hard to prove anything. There's no real justification to believe he piecemealed all the presentations together here. Not in the way you're thinking of. What you're talking about is that he'd have to record two entire sets of Mii costumes to make it work. They would've been recorded at once, and since 7 costumes is a leap of logic to begin with for Byleth(5 at least was a consistent design, and keep in mind they have multiple missing costumes anyway, which means that to get them all in, they'd still have to spread out the costumes so everything has 6 or 7, if there was never a Pass 2 planned, or some would never come back. They've very consistent about Mii costume spreading out).
Keep in mind if the Geno and/or Chocobo Hat are coming back, they'd have decided that idea at least in June alone, almost a year from now. Do you realize how long they figured out to make either for Pass 2? There's such massive leeway that it's easy to see how tons of costumes would've been decided for Pass 2 well before September. Including Cacomallow, if it had any chance of being real. This is why these "takes too long" are too flawed to be a remotely strong argument. There is no such thing as takes too long at all. They plan things significantly beforehand. Way too beforehand as is for everything to stay Pass 1. It's a safe bet by June they already intended to move things to Pass 2, but more importantly, we knew of Sans in April. They had already figured that some stuff will be in Pass 2 after deciding one of the last Pass 1 costumes. It adds very much up that they were meant for Pass 2 at that point. Since they would've been started as early as August anyway. Sans was licensed very very early on. Why should we believe it was designed to be part of the Cacomallow costumes anyway. Especially when the only way we'd have gotten Doom content was with Pass 2, as they outright said Pass 1 was discarded. The second article on it even notes that "at the time of an interview, we had no plans as of yet", with the only known interview in 2018 to begin with. That gives literally 2 years of leeway for them to do so.
So yes, it was clear they would've been Pass 2. All Doom content was pretty much disconfirmed for Pass 1. If they were made together, but split, only Mallow would've been with Byleth at the earliest, and realistically, they were made together because they were part of the same pack. That's why they were leaked together(well, faked together, to capitalize off of both them being part of the same set of content intentionally). I also forgot one other small thing; ...Why would Mallow come without a Geno costume at the same time(or part of a Geno pack)? They wouldn't be that separated either. So we're talking at least 3 costumes realistically, maybe more if the SE characters will be together with Chocobo Hat coming back. There's really no good reason Mallow would've been in Pass 1 unless it was originally for Hero with a Geno costume at one point. Cacodemon could go anywhere on its own, but as I noted, it would've been only for Pass 2 anyway because Doom content in general was hard disconfirmed for Pass 1, making any idea that part would've come with Byleth completely impossible.