Just letting you know, there was conversation was started about a month ago, including lava buckets and source / non-source block stuff. But didn't get bumped by @TADS4/ _tomathan so it went outdated. No link required here. Support. People from previous without reply: @tin15cro @Scorvix
I believe that water was taken away in the first place because people were able to make hacked items in creative and somehow with water and portals transfer them to other game modes. Thats what I have heard, I have no idea if it is true but gl.