"Leblanc as a champion is performing pretty close to our expectations overall."
What crack is your balance team smoking exactly?
Leblanc hits level 2. Q W. You're now 50%, meanwhile you cannot retaliate because shes teleported backwards. Repeats this over and over until you're dead or leave lane - No counterplay except 'stay away from leblanc'
Leblanc hits level 6, kill you without even using her full combo - No counterplay except 'stay away from leblanc'
Frustrating to play against? Check No counterplay? Check
What about this is fine Riot?