@Sync So, since Haru didn't know how exactly to respond to the changes, I thought I'd take the opportunity to jump in and help out.
Frankly, your entire "Dance of the Thousand Blossoms" needs to be reworked from the ground up. The issues that it has are plentiful, so I'll go through them one at a time for you, starting with the most glaring:
"Ironically it differs from the traditional technique which is an abundant presence of oxygen. However, this form allows the user to inhale a great source of oxygen and utilise such as a compound that will be placed heavily on the user's body, allowing to unlock speeds beyond normal means, even for a demon slayer. Their breath becomes a physical manifestation, and it births the sensible taste of frost unto the world. Their images blur in their trek, and it almost seems as if their vision is an illusion. Speed above speed, this is a style of overpowering your opponent through movements and not strength."
Consider a number of facts: This is a derivative style from the Breath of Water, not the slowest, but definitely not the fastest Breath Style. It is also
not a derivative of the Breath of Thunder, the fastest of the five main techniques. So your Dance here is a tertiary technique off from the Breath of the Sun, but also not drawn from the fastest of the main five - and you're trying to posit that it can reach "Speed above speed..."? Not just unlikely, effectively impossible - even the Dance of the Fire God has trouble with speed compared to Zenitsu's Thunderclap and Flash.
Another issue is in its forms themselves:
"It is said to have been passed down from the master's of water and evolved to its elemental counterpart, frost."
Why? Just why? In what world do Cherry Blossoms relate to ice and frost? Reading through your Forms, there is a much more heavy emphasis on the frost aspect of its creation than the cherry blossom aspect. Half the forms relate to cold or freezing, including the Fourth Form, which supposedly "...render the target to the mercy of frost." Just what is the point of this? Why the insistence on frost as an aspect of a Breath Style that has literally no correlation besides the two being originally derived of the same Style.
Thirdly there's this whole thing in your base description, which seems to be trying to posit this Style as some special kind of thing, going on about how it is difficult to understand. Sure, keep the whole anaerobic thing. But that doesn't make it any more special than any other kind of Breath Style. Ditch all the waffle bullshit about "...the sensible taste of frost..." and just write a description that establishes how the Breath Style works in comparison to others. Your Style would be vastly better if you cut the frost shit, and this notion of going faster than everyone else, and stuck to one thing - the cherry blossoms from which the Dance derives its name sake.
My suggestion would be to completely rewrite it, with a focus on the illusion of speed. Like cherry blossoms dancing in the wind, the Dance of the Thousand Blossoms could be a style, based in anaerobics, which tricks the opponent into believing that the user is faster than they actually are, relying on causing the enemy to make a mistake before entering into a fatal strike. Not only would it be an interesting Style to see in practice, but it actually fits the theme of the Breath Style.
Another thing, cut the precognition. If it were described as a skill born of experience to better react to an opponents moves, I wouldn't bring this up, but since it's written almost like he has some kind of intuitive sixth sense, it kind of needs to be addressed.
