"And since we often, without thinking, use size as a proxy for importance or power, this subtly reinforces a sense of northern superiority over the global south."

We also use position as a proxy for importance or power, so perhaps they should flip the map over as well. /s

I think a "reversed" south-at-the-top is a good idea to at least be aware of. I don't think it makes sense to reverse it since it just flips the problem, but it is (very slightly?) unlucky for the southern hemisphere.