I don't get it why can't you just lift the edges of her lips slightly to get that perfect cocky expression she always had. It was requested so many times already so please take it into consideration. I really can't see a reason not to do it. If there is one share it please. 
Pyrodinium3 votesI believe a scowl is more fitting for her character. After all, in her original lore piece is mentioned that she comes of as arrogant, rather than cocky.
Her voiceover is also more hostile and serious than playful.
And her backstory makes her the head of a dishonored noble house, sternly obssesed with restoring her family's honor.
In this specific point, I believe her expression on the new splash art fits better to her character.
Gapybo4 votesNo smirk definitely fits her better, it emphasizes her arrogance I could use that word instead. And her voice fits it, she also says snarky comments when she blocks an attack with riposte or she laughs when using her E. She is all about being better than others and enjoying a real challenge.
Shénzhì1 votesNope. "Deal with it."
Weiner the Pooh1 votesBut... They did give it back, it's just a bit more subtle.