Yes but with the Mercator projection the distortion is not dependent on longitude, only latitude. So for any given arc changing the longitude of both endpoints equally simply moves the arc without altering its shape. Adding distortion with longitude in addition to the already present distortion with latitude doesn't exactly make the problem any better in my opinion, as the arc now depends on an extra variable. With modern tech it's pretty surprising they don't just use a globe in UIs everywhere, but equal earth although good for representing size is just bad for directions. The grids cities are built on usually orient North/South, but for cities on the edge these become diagonal lines in the equal earth projection. Basically equal earth requires a choice of either accepting that all grids will no longer be oriented toward North on maps or dynamically adjusting the top of the map's viewport to point North.