I'd agree LeBlanc was really strong, but this is too much.
85/120/155/190/225 (+0.6 ability power) ⇒ 40/55/70/85/100 (+0.2 ability power)
W damage less than half??
I don't see why it's her W getting nerfed, it acted as a trade-off between mobility or damage, you had to choose.
Now that she is completely useless as an assassin and have minimal lane pressure they were really nice and gave her a compensation buff...
To waveclear ?!?!?!
Uhm rito wtf?
LeBlanc is not some generic wave clear mage, and she shouldn't be. Ever.