I personally don't care for the Banzai chant at all. At Koteis, I would routinely just not participate because, to be quite frank, I found it kind of...stupid.
At Gencon I only participated once I was brought up to the stage on Saturday to lead the chant as Hatamoto. And even then, I still found it a bit...I don't know if cheesy is the right word. But definitely unnecessary.
I wouldn't mind it being eliminated entirely, especially if there's a negative context behind it for a lot of people.
I think the more concerning bit of the article, based on the comments of the article, is the idea of the art being whitewashed and the whole controversy around cultural appropriation. Looking back through the core set, I really only noticed a hand full of cards that look explicitly whitewashed, such as Fearsome Mystic.
It's a shame they put one of the few truly white washed images on the front cover of the game. That really paints a worse picture for the game than, I think, it actually is.
As for Cultural Appropriation, it is certainly a buzz term in today's (or at least America's) culture. It's been drilled into our heads that cultural appropriation is any time anyone (mostly white people) does anything that is related to another race or country's culture, and that it's unequivocally bad.
The thing I feel a lot of people are missing is that adapting and honoring another's culture is not inherently bad. America is essentially built on cultural absorption, after all.
Black people are (generally) not upset that white people are wearing corn rows or braided hair styles. They're upset that they renamed them "boxer braids" and are acting like they discovered this "cool new hairstyle" when various black communities have been doing it for hundreds of years (if not longer). They're annoyed that it's considered a fashion statement for white people but it gets black students in trouble for having extensions in their hair. Oh, but if they wear their hair naturally (Afro style hair) they also get in trouble for having "unprofessional" hair.
They aren't upset that big butts and twerking are trendy now (see Kim Kardashian and Iggy Azalea). They're annoyed that, for decades, having a big butt was considered a bad thing until the white people discovered it, paired with hashtags like #whitegirlsdoitbetter to really drive home that, even when white people do something that minorities have been doing for ages, they still "do it better."
To me, L5R isn't doing anything like this. They are honoring various Asian cultures by combining them into a fictional universe. They aren't trying to pass Asian culture off as white or even trying to absorb it into the white culture. This is what confuses me most. L5R feels, by definition, not to be cultural appropriation, but it's being faulted for it nonetheless just due to the Race issues going on in America.