In the last few weeks though, it started feeling very heavy and ugly. I am not sure why?
I think a lot more areas are now shaded in various grays instead of plain white, which adds to feeling of heaviness and mental distraction of colours... Meanwhile roads have moved from bright, easily seen high-contrast yellow with thin outline, to blah-gray, which blends with new shadings, so they've thickened the outline to try to compensate.
It feels significantly worse, to me at least, and I'm not sure why/when changes were made (note: Firefox and Chrome on Windows 10 and 11. My iOS app seems to still be OK, Android app seems to slowly be switching over).
The PMs/designers and everyone involved need a big project for all of them to get to the next level.
Otherwise what else would they do if there just isn't a big impact project available to work on? There would be no way to advance in their careers.
The incentive of any individual in an organization is not to please the users of the product, its to make the manager happy and meet the job matrix of the next level.
Those incentives drive the product outcomes and the product mirrors the organization
(Disclaimer: Work at Google, but not on Maps.)
https://news.ycombinator.com/item?id=38398751
Not sure about the reasoning... probably not accessibility though, as the land/sea seems much less contrasting than it was before...
Simple answer - because nobody really cares.