We need a new world map that accurately portrays countries by size. The downstream effects would go crazy.
You think that doesn't exist? You think the cartographers and mathematicians in Mercater's age were just sitting on their hands?
There's already several, Gall Peters being the most (in)famous. Other than accurately showing size, such maps are pretty useless. Mercator is actually useful for navigation because it maintains angles, all "size accurate" projections have to sacrifice that.