Assassination on or off? How do you play?

Some thing really needs to be put in place for assassinations…what’s the in having an action kill if some body can take it from you? Including your own team. They have taken away the yoink medel so now people don’t care how they look. I’ve personally taken my assassination off due to it be more effective and quicker in warzone for bosses and Spartans . I can now get 3 times of much assassinations in the same time as if it were on. So what’s the deal and how can this be fixed?
What do you play, with it on, or off?