Currently Lux is tied for the same amount of skins as graves in that line at 10
She has less than Katarina and Ezreal at 11 and 13 respectively.
Jayce and, obviously, Yuumi have less at 5 and 1 respectively.
I don't get why everyone's up in arms about her getting an anime skin when she has equal to or less skins than half of the people in the skin line. But no one is talking about Katarina or Graves.