@Meddler will LeBlanc's AA be buffed/fixed in the Assassin Update?
Her AA is really, really weak and the wait time before you can auto again is a good two seconds or so - it makes CSing on her very difficult. If you have multiple low minions you are forced to use your abilities that cost 15-20% of you total mana early game.
Her auto attack does 54 damage at level 1, that is less damage than two caster minions who do 23 damage at level 1.
At the very least if her AA damage doesn't get a small buff, please tune the cast timer on her AA to be less long - there is nothing more annoying than missing CS because LeBlanc would rather just stand there for 2.5 seconds staring at nothing.
I am perfectly fine with her having ridiculously high mana costs early game because she can burst so hard, but the tradeoff would be to give her a better AA so she can CS effectively without having to blow mana and cooldowns on minions.