Kabaji is superior to Kawamura in terms of mental and technique, plus he won't necessarily try to take as large of a swing as Kawamura did, so I doubt he'll just lose to Habu. Hirakoba hasn't been mentioned to have unnaturally flexible wrists, and Kite would have to have those as well then. At the moment I think Kabaji should be able to copy all of Shukuchihou, Giant Habu, Moujuu no you na Aura, Abare Dama though. As for MV, Akutagawa doesn't have to drop it on Hirakoba's half of the court.
Regarding Niou/Yagyuu, first, there is a difference between pain from overusing ZSS/Phantom and getting attacked by Devil Akaya I think. Second, even though Niou got better at using Tezuka's skills, it doesn't seem be quite the same yet. Third, and maybe most important, you can be better against Akaya, but still get trashed if you're careless for a moment. Tachibana experience this and everyone else in Fuji's situation would have. Although this does make Akaya pretty difficult to talk about.
That said, I forgot about that convo between Yanagi and Shiraishi, so yeah, if we're considering Akaya without Devil Mode, they probably don't have a chance of winning.
Regarding Niou/Yagyuu, first, there is a difference between pain from overusing ZSS/Phantom and getting attacked by Devil Akaya I think. Second, even though Niou got better at using Tezuka's skills, it doesn't seem be quite the same yet. Third, and maybe most important, you can be better against Akaya, but still get trashed if you're careless for a moment. Tachibana experience this and everyone else in Fuji's situation would have. Although this does make Akaya pretty difficult to talk about.
That said, I forgot about that convo between Yanagi and Shiraishi, so yeah, if we're considering Akaya without Devil Mode, they probably don't have a chance of winning.