All things considered, 6.9 is awesome, and people are giving Riot way too much hate

Veigar: Always loved the champion but didn't really enjoy his early game where I knew if I put much effort into harrassing, it would bite me late game because I needed to farm my Q. Fixed.

Annie: Cool champ, but bear didn't make a huge difference past initial casting. Fixed.

Malzahar: Way more interesting (I love the mechanic of refreshing malefic visions when you hit with Q or ult. And the voidling swarms)

Zyra: I feel way more like a plant mage.

Fiddlesticks: The new mechanics on Dark Wind make a way more interesting game out of deciding when to attack and when to hold back.

Cassiopeia: Haven't played her, yet, but seems way more interesting on paper (and your DPS isn't totally hosed if you accidentally E a non-poisoned target).

To be fair, it's not perfect. I feel like mana starvation is a little too intense right now, and there are definitely some balance numbers that need fixed. Still not sure I agree with adding protobelt, but overall, I feel like the changes have made the game more interesting.