Fixes to Kalista, The Spear of Vengeance's Oathsworn

I would like to suggest to riot regarding the newly released champion Kalista, The Spear of Vengeance that with her oathsworn ability a player be able to either refuse or be able to cancel the bond. Over the past few days i have played many games involving the champion and have had quite the negative influence of her brought upon me. Situations that have come up have been the person that Kalista is bonded too either leaves or disconnects rending her ultimate useless, she would like to bond to a certain champion in a different lane so when these champions are team fighting they may work together, or i have been in games where a player is trolling and chooses her then will ultimate you randomly or during combat in a negative way with the intent to kill you, mess you up, or other negative intentions. I feel these issues should be addressed so as to bring a better game experience for players to the game.