This is the truth. Sorry for people thinking this puts a smaller wb on the same level as a larger one or 1 wb vs 2. It just makes the larger group able to wipe the smaller one 4 times faster, can't keep up with heals.
Don't know why a different outcome was expected, seemed when this change was thought of, no one stop to think of the reverse use case. Only way to make this viable is to up caps on AoE heals, but honestly think that will just offset a whole bunch of stuff and is not worth going down that road.