alright, here is a scenario:
your opponent has low health, but not low enough for you to kill him/her this round.
you have low health, and if you end your turn now, your dead.
you have 2 adrenalines in your hand and a creature out.
you use both adrenalines on your creature and deliver the coupe de grace ftw.
thats it. not very glorious, but it is a way to use this little alteration to the game