It is pretty much common sense that lip reading in general is very hard for normal people...so hard in fact that it takes a specialized feat to be able to do it.
In real life, specialized birds of prey can see fish underwater from hundreds of yards away when a normal human's eye can't see the same fish when they are standing right next to it.
I don't penalize drow for having 120 ft darkvision by making it disadvantage or intentionally trying to chop out information for them...That they have especially keen sight is a feature, not a bug.
I see the barbarian ability more like scrying than actual visual acuity....like it was a wizard seeing through an Arcane Eye. You already have to deal with the fact that there is no such thing as 'facing' in 5e...except there are things which make you figure out facing.
In real life, specialized birds of prey can see fish underwater from hundreds of yards away when a normal human's eye can't see the same fish when they are standing right next to it.
I don't penalize drow for having 120 ft darkvision by making it disadvantage or intentionally trying to chop out information for them...That they have especially keen sight is a feature, not a bug.
I see the barbarian ability more like scrying than actual visual acuity....like it was a wizard seeing through an Arcane Eye. You already have to deal with the fact that there is no such thing as 'facing' in 5e...except there are things which make you figure out facing.