I've played the game and still don't know the plot.
Hence the motivation for the original post. :p
I've never played Destiny and I enjoyed the article. I still don't understand the plot of the game, but that wasn't the author's goal, which was to explain the process behind the plot of the game -- which was very interesting.
If you have no knowledge of the games plot going into this article then there are big parts of the article that are incomprehensible, the author mentions events and characters from the game without explaining who or what or why; and why we should care if they were changed or if they did or didn't appear.