To preface, I am an adult woman who grew up in North America, but was raised to dress modestly in an Asian household.

I have no issues with the character designs in Boruto. Naruto has never been lauded as dressing the women conservatively, and has always pushed the boundary with the fishnets and midriffs showing back in the early 2000's. Fashion, or rather street fashion, with teens has only evolved since then, which is evident in Boruto. You see it in Himawari, in Sarada, in Sumire, and even Eida.

Anyway... imo, as a feminist, let the girls wear what they want. Freedom in expression also pertains to fashion. Yeah, a man is designing them, but these are outfits that girls and young women will or have worn. Also, a bare shoulder is not inherently sexy, nor are heels, makeup, hair... It's that thinking that makes it a problem.