Got bored with my main champs and decided to try some new champs
Leblancs such a great hero, no idea why no-one plays her
Leblanc is solo mid or solo top material though, in my humble opinion. It depends on the player, but the gank potential is there.
Tohou Radio! ZUN's next masterpiece... Eh? What's that? April fools? God damnit.
From what I understand the problem with LeBlanc is that everything she does Kassadin does better. So... yeah.
Leblanc is also a mage, which means her mid-late game damage is weak compared to most other champions.
I could just as easily say Tryndamere is OP because i always see him rape people , despite the fact he is easily shutdown by exhaust and hard CC.
Leblanc is all synergy based too. Your q(insert other ability here) combos will show if you flat out suck, or can play her properly. At end game, your purpose will change slightly, and people will be expecting you to know who to hit with your e for its stun and slow effect.