Meh, like I said before, I just think it's a silly thing to get upset over. But I've never been a fan of Ahri to begin with, too pandery for my tastes.
I could argue about identifying characteristics about other champions, too. Take Sona for example, one of her defining characteristics, visually, aside from the presence of the Etwahl, is her hair. Those long flowing pigtails are an identifying characteristic. And two of her skins completely do away with them. And yet in her art nobody mistakes her for someone else because despite missing an aspect, the primary identifier (For Sona, the Etwahl. For Ahri, her tails) is still there to be seen. (In fact Pentakill Sona is an interesting case because take the Ewtahl away and the resemblance to Katarina is strong. It's even why making n icon for her was difficult.)
It's still unmistakably Ahri, whisker marks or no. Nobody is going to look at that art and say "Oh! I wonder who that is!" because it's so unmistakeably her.
I don't think either of us are going to change the other's opinion here, though, to be honest.