I think Kalista would be better if her range was 525 and she had 100% AD basic attacks.

Kalista has two problems people don't like it seems:

JUMPAN JUMPAN JUMPAN ALL DAY EVERY DAY Infinite stacks on her spears thing (E I believe)

I personally believe that most people have a problem with the first, and the second is just another thing that makes the champion worse. With this in mind, her dash-per-AA part of her passive should be changed to something that works with her other part of the passive (binding to another champion).

My two cents.

I think Kalista would be better if her range stayed the same and they removed most/all of the nerfs to her attack animation/passive.

I think she's pretty close to being balanced. She's still very hard to deal with in lane if she has a good support but she's not unbeatable anymore.