Riven is Balanced
Her shield has a 1.5 second duration which people don't seem to realize, her entire burst combo require she literally stand on top of you and she falls off heavily once she can't secure at least 2 kills. Plus if you can't take advantage of animation cancelling, you're going to suck because a huge chunk of her burst has just been cut off. I tried her and found this out myself and that nerf to her ult's missile speed was the most they could have done without flat out gutting her. She is balanced, just not in the traditional sense.
