Sizing up isn't a solution when correct proportions aren't there.
I know Uniqlo is Japanese. I'm just sayin'. It might become a problem for them if they'll want the white bro customers who are accustomed to H&M, BR, and alike.
I realize that no brand can fit every customer but if Uniqlo wants to take over the world they need to expand their least common denominator as far as fitting goes.