ya, those Diana nerfs are pretty big. I get the damage off of her Q, and making the shield orbs have a hitbox that fits their animation more. The nerf to her ulti range is a bit much imo. It was pretty big, and it gave you some insane mobility, but now it's really short. The nice thing before was that her Q and her ult had pretty much the same max range, so if you could peg them with your Q, you could follow up with an ult (usually). Now, you're going to have to be significantly closer to get the followup combo off. Seems like way too much of a nerf to me.
Oh well, we'll see how it plays out. She was a bit strong, and considered fotm, but I don't think she needed to be nerfed that hard. (for those curious, she was picked or banned in 68 of the 72 matches in ipl5)