Vanilla World Gen?

[Daihok]

Is there any way by mods or otherwise to increase the frequencie of vanilla biomes such as mesa and also decrease the frequencie of some?

 

[Drbretto]

Climate control and biome tweaker are most likely what you're looking for. But I couldn't tell you how to use either of them.

 

[Hambeau]

I don't know if it has an effect or not since I'm unfamiliar with how Worldgen works in mods, but there's a Vanilla mechanic that allows you to change a slew of worldgen options, from oregen levels/amounts to "sea level" to statistical size of biomes to...

I use the feature (in the Create world tab... select world type "Custom") to stop the generation of Andesite. To me it looks too close to regular stone to be useful to decorate with and too useless otherwise