If you think Leblanc is cancerous, wait till you see...
...Nova from Heroes of the Storm.
Perma-stealth (so basically Evelynn without the AoE reveal), a targeted slow, decoys that can be activated at will, and the highest ranged single target burst damage in the game. Also can choose one of two ults - a targeted nuke similar to Caitlyn's ult that can chunk off 50% of a squishy's health or a global ult similar to Gangplank's ult that can do significant amount of damage.
At least you can dodge LB's abilities and take barrier. Only way to outplay Nova in HotS is to be a Warrior character or have hard engage because if you're squishy you stand zero chance.
I know, different game, but just an FYI.