I understand you are still typing, but I just want to comment on this line before I forget to later: " otherwise I can fathom no reason they would not include it in the Basic Rules as-is until such time as the DMG is released and they can update."
The reason I believe they have not updated the Basic Rules, is because they don't want to confuse more casual players, causing them to re-download the Basic Rules each time a new Legends and Lore article is released with rules updates. As they say in the article, they want all new published material to be done slowly, with care, and not require…