From Pitman on Disc:

More options for beginner friendly world types. Settings like these could affect the way that biome groups and land shapes generate.

BiomeMode: Continents - Generates biome groups as single landmasses separated by ocean.
BiomeMode: Pangea - Generates a single large continent, surrounded by oceans
BiomeMode: Climate Controlled - Generates biome groups in climate bands (similar to geographicraft)
BiomeMode: Great Lakes - A never ending landmass with oceans spawning as large lakes

Fromimage mode that allows the painting of biome groups

• Ability to assign hex colours to biome groups, and then paint them in fromimage mode and allow random generation to take over from there
• Would allow a simpler, more user friendly way to paint landmasses, climate zones and oceans