ok as someone who plays lux at a plat/diamond level, her new skin is absolutely terrible for competitive play
her ult telegraphs its exact size with a giant neon pink kill box before it goes off, so its impossible to catch people off guard and snipe them with it. her E is massive and neon pink as well, which makes it easy to estimate the exact position you need to move to avoid it. basically, it makes her spells too easy to see and predict which makes it nearly impossible to land anything on high rank players.
it is cute tho