Re: on the subject of Metatron...
This is explained more in Judaism than most people glean from reading the Bible, or Newage Angel books.
There are two Metatrons, their names are spelt differently in Hebrew, but not in English. One is the "original" Metatron, the other is Enoch. One is YHWH's voice in Heaven (the Original) and the other is His voice on Earth (Enoch). There is talk in some texts of them being combined/subsumed into the same being. I think the act (in my paradigm) of tying an outside entity into being a Celestial takes a lot of energy and effort, not something undertaken lightly, but not impossible. Though as said, some texts say it is more that they were made into one, so it isn't that Enoch was just made into an Angel, but his Soul was actually taken into the Presence and released in part.
I very much doubt the idea of him being Nephilim, if taking Biblical and extra-Biblical sources as truth. For one, extra-Biblical texts were good at outright saying "Frank was Nephilim" so why not Enoch? Also, though a timeline isn't strictly given, the Fall of the BNI is focused on in the story of Noah, and not touched upon during the era of his Great-Grandfather Enoch. So while you could argue that the BNI and Nephilim were only mentioned beside Noah, in order to set the stage for the deluge, it seems odd that they could have Fallen before and been ignored. Especially for as long as at took those Patriarchs to reproduce, heh.
When we first begin all things simply are.
As we grow all things are external.
As we learn all things are internal.
As we understand all things are not.