For people like me, it's much easier to navigate the new map theme because the old style feels too disorienting and eye-straining. I ask the developers to add an option to use the default theme.
As the official statement claims "the default map isn’t ideal for GeoGuessing", implying that it probably doesn't give any advantages to players (https://geoguessr.canny.io/changelog/guessing-map-update-10th-of-march). Moreover, the difference is only in color palette and not the behavior (what shows up on zoom in/out is the same in both themes). Therefore it wouldn't be unfair to allow such an option to exist and it would create a more inclusive space.