To all the people calling this an outlier, I ask, how is it an outlier exactly? This won't make anyone FTL, and it doesn't even scale to the Samurai themselves. Issen isn't the physical sword swing, but the chakra slash/beam itself. This means that the Samurai aren't physically moving at LS, but are unleashing a LS attack. In other words, it only applies to their Attack Speed.
Like Null said, if this goes through, it'd only scale to high, top, and god tiers. If memory serves, only Sasuke reacted to one of these slashes, and Sasuke is no fodder. Him having Sub-Rel to Rel reactions is no outlier, especially given his war arc feats later on (I know he has the EMS then, but it's not like it offers a guaranteed massive buff to reactions that we know of). He also barely reacted to the Raikage, a top tier in speed, and Killer Bee, another high/top tier. So yeah, I don't see any outliers there.
Also, this whole "The Raikage will be FTL for going FTE to Sasuke" is incorrect. He won't be FTL, that's not how this works. It'd be a blatant case of calc stacking.
Finally, the whole "Madara's attack would be useless" thing. No......? I mean seriously, what kind of argument is that? Just because a strong character uses a LS move, doesn't mean weaker characters can't either. Unless y'all wanna go back to the good old days when Kizaru was the ONLY possible LS user in One Piece, nobody was allowed to scale above him, and all LS feats were considered outliers.
Like, y'all would have a great point IF this resulted in the Samurai having LS movement, or some other characters having FTL speeds, but that is decidedly not the case.
It was never said that the Light Fang is the fastest attack in existence, or that nobody can have attacks that move at LS. That is simply untrue.
