Hmm, I don't think I can add much to major new stuff that other people aren't already talking about or were sufficiently covered in the chapter...
But just to be brief Felyne's are cute and wonderful, and the Kamui question is concerning. Mostly because finally shifting over only to be immediately obsoleted by the forge would really suck for poor Tetra. And even without that, a Kamui is in and of itself a transforming outfit. Joe already has a full outfits worth of gear and armor plates, and due to the nature of his perks or the enchanted gear in question, it can't all just be life-fibers. I'm sure it's possible to shove the two together, but I don't imagine it'll be easy.
And on a less serious note...he has rainbow hops? Really? I'll be honest, a lot of the cosmetic perks are outright cringy or annoying, when they aren't seriously detrimental (looking at you Enigmatic Artificer and friggin TITLE CARD). Some of them (the posing and innuendo in particular) have potential for interesting interactions and character development, similar to how other perks like the Transformer memories affect Joes perspective. But while the two big 'stranger' cosmetics are globally known and major plot points now, the rest are just annoying and burdensome. And them not having an 'off' switch, and thus being a permanent undesired addition just aggravates me out of sympathy for Joe. Even the demonic castlevania rituals and the soul bottles could just, NOT be used if Joe wanted. Honestly removing all agency like that, and for a perk that isn't a clear improvement in something, even if it may be awkward initially (looking at the various body-mods that have made Joe more swole and/or bishie) it just feels like an overall detriment. Something that doesn't belong in the Forge, where the perks are meant to be beneficial.
It's still overall minor, it just bugs me at least every time something like that comes up. Even the worst gifts of knowledge and experience the Forge has given, so far, have that knowledge be an intrinsic requirement for their primary function. Being a true expert in Cybertronian tech takes BEING a Cybertronian. Having Combat Engineer skills takes military training and experience. Knowing how to counter demonic rituals means knowing the rituals in the first-place. 40K Mechanicus tech, enough said. Even for all the negativity, those perks don't remove agency. Joe still gets to decide what to make, what knowledge to use, or when he's not stoned out of his mind on pain whether or not to transform. Even the innuendo and posing is only natural and can be suppressed. Little 'cosmetics' though with no control, that just activate? And aren't actually helpful, just a cheeky reference that only makes sense in their respective Jumps? That just ticks me off out of sympathy for poor Joe.
Okay, rant over, for real now. Final thing. Joe is hot now right? Between the body built with aesthetic powers, demi-god transformations, and Aphrodite's blessing...he's changed a lot. But the only (human) person that's really seen him is Aisha. When is Joe going to finally stop concealing himself? Honestly, the reactions to his personal reveal are something I'd look forward to greatly...except doing that makes no sense in character. He does apparently still look like his old self (on the one hand, less of an identity crisis. On the other, constantly concealing yourself from everyone you know to not reveal major changes.) and that makes a disguise currently necessary. But it's not like this is the sort of thing he should keep up forever. And now Joe has the ability to make enchanted gear that could protect his identity even without concealing his appearance.
Actually, on that note for whatever cool-down chapter comes next, instead of staying in the Forge why not head out into the city with an identity obscuring mystic code and no other alterations? It'd be a chance for Joe to get used to his new body in public, interact with non-Forge characters, and checkup on the remnants of the Ungodly Hour more personally. In particular the Dust. I know at least I'm happy about that. The PRT and Tinkers fiddling around with Joe's tech, and it not getting stolen away by Fiat is interesting. There may even be minor mining operations going on!