To me these changes were made to get to the idea of a monotheist belief. Only one god. Elohim means gods plural and I believe the original texts says Elohim not Angels or sons of Israel.
There is also some idea floating around that the name Israel was used as the name of a god in some supposedly ancient writting from Phoenicia but I can not find the source to this idea.
Anyway yes gods got shrunk down to god and many of the writings in the Bible aren’t even talking about the same god. There are writtings that can be traced back to Enki, Enlil, Marduk, Ammon, Osiris, El, Baal , Inanna, Zues just to name a few.