The only thing you haven’t addressed is why there doesn’t seem to be an implied {w} in the {o} sound in all the recordings of Okrand pronouncing words like {Qo’noS}, or any other word that includes {o},
I did address it. I speculated that only words that actually end
in o use a diphthong. That excludes words like Qo'noS.
You brought up the example of {gho-} as a syllable that doesn’t follow the {o} with a consonant,
No, I brought up the word gho as an example of a
word that ends in o. If it's actually about ending words
with o, then the prefix gho- will never qualify
for a diphthong, because it never ends a word.
So, no, you didn’t explicitly say that Okrand’s verbal description applied to only {gho-}. You said that maybe it only applies to syllables ending in {o}, and the only example that I know of is {gho-}, so that does logically follow that he’d be giving that description of how {o} is pronounced in {gho-}, while not giving an accurate description of the {o} sound in any other syllable in the vocabulary.
I am not responsible for your inability to think of other syllables ending in o. I can assure you that I had several of those other words in mind too. I just picked one to make an example.
-- SuStel http://trimboli.name