Partial Regeneration Option

As of yesterday, a Oceanic Overhaul Update was added to Minecraft

However for Mass World Builders like me who constantly add to the same world, starting over isnt a option to gain the new blocks added. I play on survival and build massive structures.

The idea is simple, add a Partial Regeneration option to the menu, allowing premade worlds to add in the new Blocks available in they're specific Biomes, Restrictions of this obviously would be the regeneration would have to be a certain number of Blocks from any Player made structures. And would slightly. Change the map.
This may cause some player structures to become disheveled, or have blocls spaen on top if not restricted Accordingly.

Thankyou