Hey DMs and Players! I could a ruling on potential balance issues with this homebrew Samurai class

Hey all, I'm about to start up a new game and one of my players would like to use this Samurai Archetype for his Fighter character. I'm generally wary about homebrew classes though, especially on the dandwiki.

https://www.dandwiki.com/wiki/Samurai_(5e_Archetype)

I do think the bones of it are pretty good and I'd like to make it work for him. What do you all think?

Overpowered? Underpowered? Changes?