Sounds like Kalista will be a horrid choice for solo queues.
Since her kit requires that you pact with a complete stranger in solo Q, I can tell this is going to lead to some serious griefing action. What if you end up throwing your teammate to their death or yanking them away from a kill?
"Just report after the game!"
Doesn't work. You'll just get reported back for "ruining [their] fun".