I prefer to play on a larger map size than the default, but I occasionally forget to change the map size while selecting my landing site. I would like to request the ability to set what we want the various defaults to be, and have the game remember them for the next new game.
Alternatively, the "Advanced" button could be removed from the landing site selection world map screen, and added to the big empty space in the window where the world generation seed and generation fill size is selected, without being hidden behind an unneeded button.