How do you go from a naive kid who wants to see the stars to someone who speaks like James Earl Jones? I don't think the manner of speaking should be a major concern from the get-go, that's a dialogue issue to be worked out in the script stage. I personally feel that the way he speaks in the OT should be learned from Obi-Wan as a diplomacy tool.

In retrospect, I guess I answered my own question there.

But anyway, I still think you're too attached to the Lucas prequels - there's nothing wrong with parallelism or symbolism, but you have to be careful that it doesn't border on rehash or lazy storytelling.