Dr. Bill:
This is not intended as a refutation of your post just above. I think you make a lot of sense. But let me offer this more simple take:
Exodus 7, v.1: (God) said to Moses: "See, I will make you as a god for Pharoah, and Aaron you brother will be your prophet."
An alternative translation is "I will make you as an oracle for Pharoah ..." See also Exodus 4, v. 16: "He (Aaron) shall speak for you to the people (Hebrews), he shall be for you a mouth (spokesman) and you shall be for him a god (alternatively, "oracle").
Backing up to verse 10, it appears that Moses was "not a man of words" and was "heavy of mouth and heavy of tongue" indicating maybe a speech impediment that he was using as an excuse to skirt the task of confronting the Pharoah.
To reinforce Moses confidence, God calls him an "oracle" and points out that brother Aaron can act as his spokesperson or "prophet" (like the ringleader, carnival barker or M.C. of the Moses and Bros. Travelling Medicine Show) until such time as Moses worked his snake magic and subsequent marvelous acts, thereby "appearing as if a god to the pharoah."