Maybe the "nuthin new here" is part of the problem? There have been plenty of ladies with their tits out, yes, though this is the first time I recall seeing one that's so blatantly non-sensical. She's a mechanic FFS, she needs clothes.
She isn't treated as a sexual object; her sexuality isn't on display in order to titillate you. Sex and sexy isn't off the table--it's all in how it's handled. Even Inara, who's a prostitute for goodness sake, has more agency in regard to her sexuality than most female characters in video games.
That said, I do still like Cidney so far, even if she is dressed smurfing stupid.