I'm a prety average player, but after playing LC, i found her really too easy to play.
Really easy jungling (i started at lv2 after harassing a tiny bit the solo lane, as Dire)
2 self cast+Blink+Ulty = free bonus damage + excellent engage
I understand stunners can disable you, but in early games, you can choose your targets, and in teamfights, you can wait a bit, and backstab the mage/support/stunner wit your ulty.
Is it because i'm in the lower brackets that few people know how to counter her, since i rarely see her in"real" official matches, but snowballing takes a all new meaning with her.