I remember someone suggested Poison be replaced in battlegrounds with something like “Venomous” (Yes yes, I know, terminology and such but this was what someone else said) which would only last for one attack from the minion with it. So if you had two minions fight, one with “venomous” and the other with divine shield and the Venomous minion hit the Divine Shield minion then the divine shield would pop and the venomous minion would lose the Venomous effect and be unable to one shot the opposing minion.
Seemed like a good idea to me. Keeps the lethality of killing big health enemies but without poison being so oppressive when it is too easy to get.