I think LDW have fixed it so that exploding potions won't kill a villager on their own. The sight of a villager suddenly turning into a skeleton might take away the "all ages" certificate of which they are rightly proud. However, the villager will quite possibly have a health bar registering 0.0001% - any further accidents or sickness will tip the villager over the line.

As suggested, if any villager who gets blown up it's worthwhile to brew a restorative potion straight away.