Kalista's preview was misleading.
On the preview page, Her passive indicated that the receiver of her spear could choose weather or not to pick it up.
Her ult said that all of the soulbounded's abilities would turn into one that could propel them in a direction, not clicking.
I feel like this is how it should work in game. The Soulbound should choose to pick up the spear, and their abilities should make them activate her ult.
Also, It's annoying that I hear her from all across the map.