That might be true, when you stay in the hole it is harder to kill them ,but i can take as much time as i need, cause it has no consequence when i stay in the hole.
What i want to say is, it feels like cheating to me, maybe it's better when the usage of the healing is limited by a number or the zombies drop some kind of health pickup. Then the player is forced to move around. Just a thought tho
And i don't mind when you show this video on your Twitch stream