>>99265231First of all, short hair and sports bra fit her personality and backstory. Her personality as a no-nonsense hero who deals with her threats in a quick and usually lethal way (which she had even BEFORE the revamp) and her backstory as a soldier both fit a practical 'military' look.
Second, there is a TON of female characters with long hair and big boobs. She-Hulk, Poison Ivy, Black Widow, Black Cat, Harley Quinn, Power Girl, Zatanna, Black Canary, Wonder Woman...
I can think of THREE characters TOTAL that have practical costumes - Kamala Khan, Spider-Woman and Batgirl - and all of them also have long hair. So Marvel's practical costume and short hair makes her stand out from all the other characters.
Y'all just want all characters to look like your jerkoff fantasies, at least admit it.