@Riot: Can you make it so Kalista's passive uses charges?

I see you managed to get a "move-and-shoot" mechanic on Kalista, but people are rightly concerned that it will make her impossible to chase with Champions like Garen, Darius, Olaf, etc. Sure, it might require some insane APM on the part of the Kalista player, but that's hardly an issue in pro matches or anything beyond Gold.

Since she might be capable of kiting in ways that would make Lucian, Vayne, and Ashe cry, I suggest that Kalista be limited on how many "slides" she can perform in a short window. Basically, make it so that her passive requires charges that replenish over time, and essentially gate how many consecutive slides she can perform in a short window.

If this is not a viable change, can you give context as to why?