Kalista needs an ult rework or secondary effect.
Your ult basically becomes useless when your support decides to either afk, or has a DC due to bugsplat or other unforeseen consequences.
Out of all the champions in the game, she is literally the only one who's kit gets penalized for having an afk or otherwise.
Her ult either needs to be reworked or have some sort of secondary benefit that doesn't make it useless as hell. (btw this has happened to me 3 times since Kalista has come out)