Custom World Generation Options

It would be nice if there were additional generation options when making a new world, similar to games like Civilization. This would give players much more ability to customize their world to their liking, and could allow for interesting roleplay possibilities. For example, ocean biomes are currently rather small compared to landmasses, making them feel more akin to lakes than oceans. This makes a great deal of sense from a normal gameplay perspective, since it would likely be frustrating travelling through 20,000+ blocks of nothing but water for an entire afternoon, but that experience could also be desirable if you want to run a survival island scenario, for example.

Advanced world generation options could allow for archipelago worlds, high-elevation alpine worlds, worlds favoring hot or cold biomes, and much more. I think that Civilization VI's advanced map options are a good baseline for what could be introduced to the game, but with much more granular control over world generation I feel like the player would be free to create some truly bizarre environments that could inspire interesting and unique builds.