By all means criticise the review, but can we at least lose the justification of 'but casual readers of Polygon might come away with the idea it's a bad game!'
I'd imagine people who
A) are possibly interested in niche Japanese brawlers with distinctive art styles and
B) are disinterested enough to read one, and only one, US-based site for their computer games news, rather than ones that cover such games with more regularity, and
C) are regularly put off by a single mainstream critic of the art styles of their niche tastes in computer games
Are a very, very small minority.
Why not just be honest and say you didn't like the review laying into the art style, rather than trying to claim some moral stance of stopping some imaginary people who aren't as informed as you from being conned? It doesn't say much about your opinion of Polygon readers to infantilise them in such a manner, forumites often assume everyone who doesn't spend hours discussing things online is an idiot, but it's simply not true. People that read online reviews, on reading a middling review of something that looks interesting, know that a second opinion is two clicks away, it's not like those who only take their book reviews from a particular print publication.
An awful lot of Japanese games end up with a wide array of scores in western media, not just because of sexualisation, but for all kinds of issues, if we kicked off every time a JRPG took a shoeing from a single critic, it would never end. One outlying 'average' review in a sea of praise is nothing, if anything it's a good thing, it shows that the whole shebang of games journalism isn't just a hype train. If GAF was entirely made up of consenting opinion rather than a few, er, 'interesting' takes on things, we'd have much less to discuss.
I also don't think reviewers have any responsibility to help the sales of niche games beyond making readers aware of their existence. Just by featuring it they do enough, as it makes their readers aware of them, and such readers can then go off and look up more info. However, beyond that I'd rather they were on the side of their readers and published what they believed to be their considered opinion, otherwise what's the point, there needs to be a divide between editorial and marketing. Considering that a wide array of opinion is available for free and opinions that are far outside of popular understanding are usually flagged up as such and discussed online, I really don't see a problem with that. So a female reviewer didn't like the art. So what. It doesn't make her opinion invalid, it just means she didn't agree with some other journos. They aren't a monolithic block and the press would be in an even worse state if they were.
Finally, seeing as it isn't even out yet, I'm not really sure how the other complaints of repetitive grinding can really be criticised yet either. How people manage to whip themselves up into a frenzy of thinking the opinions regarding gameplay of people who have actually played a game are invalid based on them looking at trailers and art released by the marketing department is beyond me.