Completely agree. Dying during rift animation feels very bad. In pvp and sometimes even pve if you don't use it behind some sort of cover you're just going to die. Just as others have said I think a quick bandaid fix would be to give some sort of overshield during the animation, or even a quick burst of healing to the warlock at the start of the animation. I think both would be pretty easy to tune with minimal effort. However in the long term I think all animations should be looked at (super, ability, etc.) and tuned more toward the quicker gameplay Destiny 2 is heading towards.