Kalista's mechanics are kind of anti-fun to a majority of the champions currently
I've played against Kalista, I've looked up her stats and her abilities, and I've tried to focus on what weaknesses you can expose in her because she does very well in a lot of my games. From what I understand she has really 2 counters/weaknesses. You have auto-target hard CC for her (which requires a small pool of specific champions and is probably why annie is so popular as support right now) or you try to time skill shots on her so that her inability to cancel an autoattack forces her to take it.
I feel there are two innate problems with these weaknesses. The first one forces you to play a limited of champions because anyone without hard cc and auto-target spells gets countered to the point of no counter-play. The second weakness of not being able to cancel attack animations almost makes it easier to dodge skill shots in my opinion. She can hop away as soon as she finished a skill shot making the window of opportunity very small, and if she notices you are starting to land a few shots due to predicting when she's going to last hit, she can start to fake you out easily since you are throwing your skill shots out earlier than normal due to the smaller window than most ADCs and are more likely to jump the gun when she fakes going in for a last hit. Another note about her inability to cancel an autoattack is that once she gets even one attack speed item, any window of opportunity is non-existant.
I feel like the small amount of weaknesses and counterplay with her are miniscule compared to the amount of strengths she has. In reality, she has no weaknesses that every other ADC doesn't have, but she has a lot of strengths that no other ADC can claim at all. She just seems to outshine unless you go out of your way to HARD counter her, and I feel as if that is exactly the definition of what others would say is anti-fun. I haven't talked about her auto attacks missing if you lose vision. Anyone who has tried to take advantage of this weakness, tell me how effective it was and if you were able to continue it or if it was countered quickly by wards or something.
Let me know if anyone else has any thoughts about counterplay with her and if her mechanics leave room for fun and creative counters or if it limits the game for you.
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. Both slows her attack speed, in which she relies to make her infinite jumps so if you take out the attack speed, she can barely kite anymore.