Changeable Water

In Minecraft 1.13 we got the new update with oceans but I think we should have changeable water, so if your in a plains biome you can have cold ocean water or warm ocean water maybe you can place a ice block underneath it to turn it cold or Frozen and then you can break the block, samething the for cauldron (like a swamp biome underneath the cauldron you place mossy cobblestone or something other) or different buckets of water swamp water warm water or cold water. (Sorry If I messed anything up I'm not very good at spelling)