About The Kalista Changes
I feel like these are a really... inelegant solution to her problems. Yes, balancing levers are good. No, HAMMERING on balance levers onto a kit is not good, especially on one with SO MANY balancing levers already. It's like baking a cake, and your basic ingredients are out of balance in terms of proportion, and here you're just adding salami onto the cake and hoping it'll taste good. There's a better way to do this.
Problems with Kalista that you have identified: >Kalista spikes too hard with early AD. http://boards.na.leagueoflegends.com/en/c/gameplay-balance/WA4q6QRP-soooooo-meddler-and-co-are-there-any-further-plans-for-kalistareksai?comment=0001
I agree that you should punish her for building early AD and soften up her powerspike, but I believe there's a better way to do this. >Lower her base attack speed and attack speed growth per level.
Kalista, you want to rush early AD for huge damage? Fine by me. Hope you enjoy hopping sparingly and not being able to apply Rend stacks frequently. Here's a more, in my opinion, elegant solution; you avoid the complexity, and now players are faced with a choice between crappy attack speed with high damage, or high attack speed with mediocre damage.
As it is, you're removing any and all hope for Kalista players to build any sort of crit, making her feel clunky, and balancing her in the wrong ways. Revert the rest of the changes and tinker with the levers you have, please.