...rat-kids? I thought I had heard a lot of insults but that's a new one on me.
Two of my complaints didn't have anything to do with Katarina's face. For her face specifically, I might be fine with a face you'd expect from a fighter in the heat of battle or something.
Riot did NOT do that, though. They left a point-blank, melee assassin with only a bra, basically. The angle of her face is weird since because of the Sonic pose (or, she looks like she's doing the Charger move from Left 4 Dead 2), you can't really tell what it would look like normally anyway. Even more than that, her lips look like they're super full, oddly pouty, and colored with lipstick. Her entire face seems to be glossy and flawless (more makeup?) besides the one trademark scar. Who puts on a ton of makeup for a battle?
It looks like they have still left in random sex appeal to me. I just don't think it looks great for the variety of reasons mentioned.