User blog comment:JmLyan/Ailalia, the Mirror Spirit/@comment-4296199-20130523021618/@comment-7481207-20130523141601

Her ult has a high cast time on low levels, so you could run away while she is casting it to ensure she wastes it. When she has maxed it, it is indeed powerful 1v1, but that late in the game you mostly fight in teams, where it is less powerful. Building her tanky also makes her ult less powerful.

As for the utility, her W can't both stun and deal high damage to the same target, and her second E requires precision to use correctly, as unlike veigar's E, it won't remain where you place it, but rather apply the effect only when cast. Her Q will also reflect allied projectiles, so it's a bit of a double edged sword.