How is that any different than before? She's worn pantyhose in her classic costume and track pants in her Alpha costume.
A lot of people think that a female character design can't be "sexy" unless she's exposing everything except nipples and genitals. These folks act like female characters being redesigned to show slightly less skin will lead to a dystopian future where feminist death squads go door to door executing men for masturbating to anime and video game pics.