Some ideas to block generation

There are 2 ideas with the block generation. First is that there could be an option to spawn the block like a layer. The mod creators would be able to set the thickness of these layers. Second, is that maybe mod creators should be able to spawn blocks on top of other blocks. Like flowers, pumpkins, melons etc. The final is that there could be something like spawning these veins as separating the ore blocks. Like copper will do in 1.17. Although I know, that you cannot do everything, but these are maybe possible. The last two is for sure.