Feels like Luffy vs Katakuri to me. Shin keeps being treated as punching bag, or slashing bag. He's half dead while Houken is still more or less healthy apart from the finger cut he got from Kyokai. And the whole "Bushin's path" sounds boring and bullshit. Riboku even literally said "human can't understand this story" to admit while excusing the bullshit lol.
Some weeks ago
Shin to Houken: Just what are you?
This week
Houken to Shin: Just what are you?
Just end the fight and hold hands Fairy Tail style.