Perhaps it would help to rephrase some of the questions in the original post. For example:
What evidence is there that Richard Norwood of Leckhampton, Gloucestershire had a son William? I don't see a single shred of primary source documentation. There is a secondary source, "Southside Virginia Families" (p. 332) with the unsupported claim (coming from another secondary source) that William Norwood was "an authenticated member of the Norwood family of Leckhamption, Gloucestershire." Okay, this has been "authenticated" -- but this authentication doesn't mention his father's name. Sorry, but I have to wonder if "authenticated" means wild guess, or maybe wishful thinking. Maybe there is evidence out there. If so, it should be added to the profile.
However, when we look at the names of the children mentioned in William Norwood's will, we do find the names Richard and Elizabeth, which one would expect if William Norwood was the son of Richard and Elizabeth. We also find the name George -- which appears to be the name of William's father-in-law, but this seems to involve a leap of faith. (George Jordan was the god-father of William's son George Norwood, but does that mean that William's wife Lydia (surname not given) was the daughter of George Jordan? [DISCLAIMER: I haven't studied these families carefully, so maybe I'm missing something obvious here. If so, please let me know, and I'll be pleased to stand corrected.]
Next question: Where is the baptism record of William Norwood, son of Richard? What do you mean there isn't one? Maybe Richard had a cash flow problem at the time and skipped the baptism to save money? Maybe the minister was lazy or forgot? Okay, these things happened, next question...
Are there any other baptisms of William Norwood, of the right age to be the immigrant to Virginia? Hmm, check the IGI, check check check, HAH!
William Norwood, son of Thomas, was baptized 27 Aug. 1609 at St. Peters Thanet, Kent. Could that have been the immigrant to Virginia? We don't have any record that Richard Norwood of Leckhampton had a son William, but on the other hand William Norwood of Virginia didn't have a son Thomas (as far as we know).
So that seems to put us back to square 1, with the fact that William Norwood of Virginia named a son Richard as the only evidence that William was the son of Richard of Leckhamption, together with the fact that Richard Norwood of Leckhampton's father and a brother were named William, together with the plausible supposition that William of Virginia was a kinsman (first cousin?) of Henry Norwood of Virginia.
Right now, anyway, it seems that "questionable gateway ancestor" is about as good as it gets. But of course who knows what further research might turn up.