Suggestion for future Champion Spotlights: SHOW COUNTERPLAY
Looking at Kalista's Champion Spotlight is going to make people unfamiliar with her scream "OVERPOWERED!" until they croak. Frankly, a lot of your more recent Champion Spotlights have done this too, only highlighting the Champion's super-powered strengths while not giving any advice on how to beat them.
While you might go "Figure it out for yourself!", that's not a good idea. (EDIT) Some players, with less experience, will not be able to look at something and see both the pros and cons. They will only see the pros and be led to believe it to be overpowered.
I could see that Kalista's kit is very vulnerable to direct-target crowd controls (i.e. Annie, Maokai, Ryze) and to power-knockbacks (Tristana, Lee Sin, Alistar) that separate her from her Soul-Bound, but the majority of those teenagers playing this game are just going to b!tch and whine instead of thinking.
When Blizzard was doing its demonstrations of new units for Legacy of the Void, they showed for each unit how to beat them or highlighted their costs/risks/etc. For instance, the Ravager? Micro to dodge its special attack. Speed Banshees? Use Oracles to negate their cloaking and then kill them with Phoenixes. Hercs? Use Roaches or Zealots.
But Riot? They don't show how to beat their new Champions. And even if you do show them that, will it always work? No. Good players could counter your counterplay (i.e. OUTPLAY).
Please do this in future Champion Spotlights so that every new Champion doesn't look broken.
s. Still, welcome to the club.