I encourage you to make a poll with the title being would you be happy or sad to see Kalista's martial poise removed, I'm sure many people would be ecstatic to see it go.
If Race car Jhin is able to kite better then Kalista, why isn't it as popular as his AD/penetration build? The answer is the video you just showed, ironically speaking.
You show a video of race car Jhin; the same Jhin with the scoreline of 6/16/14? At 46 minutes into a game, ergo, ADC's strongest point.
You show a relatively new champion kiting a champion who is an ancient relic of the past who doesn't have the kit to be strong in today's meta for a reason hence why he's the next reworked champion. But yes, its a mystery as to how WW wasn't able to keep with him.
I don't think I really need to go any further then that.
But I'll entertain this anyways:
Not only that, Jhin needs to build into an incredibly specific path to be able to do that, which gimps his overall damage significantly. Had he gone the normal path build, WW would have been dead in a quarter of the time it took for him to kill him as race car Jhin. Jhin needs to make a decision with the way he builds: if he wants damage, AD. If he wants kiting, AS.
You talk about how he has missing health executes, speed boosts, and objective control. What you fail to mention though he needs to invest into two different stats with two very different build paths if he wants health execute or if he wants kiting.
If he gets AS, yes he has health execute, but its pretty pathetic without building AD, your own video even shows how bad the execute is without AD.
As for objective control, not sure where this comes from, other ADC has much higher kill times on all objectives then he does. Towers, Tristana and Jinx both are leagues better than he is. Neutral objectives, Kog'Maw, Kalista, and Vayne are again, leagues better than he is.
Kalista also needs AS to increase her kiting ability, but AS not only has synergies with her kiting, it also has synergies with her damage. If she wants damage, she gets AS. If she wants kiting, she still gets AS.
See the problem and difference?
Kalista being reworked vs Karma and Fiora is apples to oranges to pears.
No one wanted Karma to be reworked, her reworked arguably left her in a worst state with nothing gained from it.
People disliked Fiora for two reasons: her ultimate felt as if it was out of place on a duelist kit and on her release, she was incredibly overbearing as a bruiser.
As it stands. no one outside of those that play her likes her kit. Even then, many people who main her have acknowledged there's a fundamental problem with her design. No one is arguing for her to keep her current playstyle, rather its the opposite, her current play style needs to be eradicated in order for her to be healthy. Kalista's kit will never be buffed in its current form and tied to the issue being her passive from start to finish in every game, invalidates a large number of champions.