Mage Update has caused Mana Problems
As someone who plays LeBlanc frequently, I've noticed that I have been having absolutely horrible mana problems all game. Since Morello is an important item of LeBlanc, the fact it has no mana regeneration now has really hurt LeBlanc. The reason being her abilities simply cost too much mana, a rotation of 4 spells pre-6 leaves her with practically no mana - and since you need to kill a target or level up to get mana back from Morello, you've no other choice but to wait until you level up.
I don't think she needs a buff on any of her abilities, I think her base mana pool needs to be increased - or her abilities need to cost around 10 less mana each.
It sucks when an enemy dodges a chain, and already there goes 80 of 334 mana - that is virtually 1/4 of her mana to start with!
Maybe I have an unpopular opinion, but respectfully I think she has some mana issues that need to be looked into.