"Sister" the
CLONETROOPER you are are referring to has been nothing more than a minor character in two Star Wars novels, she has never been the focus on anything, it was not shoehorned in, she's been a thing for a whole two years and no one batted an eye until people started bitching about trans people even harder, then started digging up everything they could to sow outrage like you're experiencing here, she isn't new, she's BEEN a thing.
Why are you calling her a derogatory slang word when you could literally just say you don't like the way she looks, even though she is not supposed to be this attractive, fair looking woman, she's supposed to be rugged, she's an outlaw, a literal scoundrel. When you
don't use an edited-in-poor-taste image to spread a false narrative, she doesn't even look unattractive or unpleasant in the slightest. The VA was happy to be able to bring Kay Vess to life so well in the game as well, Kay is
loosely modeled off of her VA, a common tactic game developers have been using for years and is only becoming more popular.
Yes, the stealth takedowns are stupid in the way that they don't have unique ones for the stormtroopers, but that is one of the smallest nitpicks I've seen in a game aside from people whining their ass off over a cleft chin. It's a game, suspend your disbelief, the series is sci-fi, anything can happen.