I agree with almost everything you said and I appreciate that you've actually researched the original language which most readers do not. However, I don't understand where you get this from:
So from a perspective, sheol/hades/hell, always refer to the same place. That temporary holding place for both the saints and the unsaved. The dead "saints" are in "Abrahams Bosom" while the unsaved reside in "hades".
I've crossed out the parts I don't agree with. I've crossed out "hell" because you know as well as I do that the modern definition of hell is nowhere near the actual definition for either sheol or hades, so why you would lump it in with those two words makes no sense to me.
"Ἅιδης (Haidēs, 86), ᾅδης, -ου, ὁ, (for the older Ἀΐδης, which Hom. uses, and this fr. α priv. and ἰδεῖν, not to be seen, [cf. Lob. Path. Element. ii. 6 sq.]); in the classics
1. a prop. name, Hades, Pluto, the god of the lower regions; so in Hom. always.
2. an appellative, Orcus, the nether world, the realm of the dead [cf. Theocr. idyll. 2, 159 schol. τὴν τοῦ ᾅδου κρούει πύλην τοῦτ’ ἔστιν ἀποθανεῖται]. In the Sept. the Hebr. שְׁאוֹל is almost always rendered by this word (once by θάνατος, 2 S. xxii. 6); it denotes, therefore, in bibl. Grk. Orcus, the infernal regions, a dark (Job x. 21) and dismal place (but cf. γέεννα and παράδεισος) in the very depths of the earth (Job xi. 8; Is. lvii. 9; Am. ix. 2, etc; see ἄβυσσος), the common receptacle of disembodied spirits: Lk. xvi. 23; εἰς ᾅδου sc. δόμον, Acts ii. 27, 31, acc. to a very common ellipsis, cf. W. 592 (550) [B. 171 (149)]; (but L Τ Tr WH in vs. 27 and Τ WH in both verses read εἰς ᾅδην; so Sept. Ps. xv. (xvi.) 10); πύλαι ᾅδου, Mt. xvi. 18 (πυλωροὶ ᾅδου, Job xxxviii. 17; see πύλη); κλεῖς τοῦ ᾅδου, Rev. i. 18; Hades as a power is personified, 1 Co. xv. 55 (where L Τ Tr WH read θάνατε for R G ᾅδη [cf. Acts ii. 24 Tr mrg.]); Rev. vi. 8; xx. 13 sq. Metaph. ἕως ᾅδου [καταβαίνειν or] καταβιβάζεσθαι to [go or] be thrust down into the depth of misery and disgrace: Mt. xi. 23 [here L Tr WH καταβαίνειν]; Lk. x. 15 [here Tr mrg. WH txt. καταβαίνειν]. [See esp. Boettcher, De Inferis, s. v. Ἅιδης in Grk. index. On the existence and locality of Hades cf. Greswell on the Parables, App. ch. x. vol. v. pt. ii. pp. 261-406; on the doctrinal significance of the word see the BB. DD. and E. R. Craven in Lange on Rev. pp. 364-377.]"
Thayer, Joseph Henry.
A Greek-English Lexicon of the New Testament, being Grimm's Wilke's Clavis Novi Testamenti, translated, revised, and enlarged. Corrected edition. New York: American Book Company, 1889.
Sheol was rendered as "hades" in the Old testament since there was no suitable word in the Greek in the New Testament. "Hades" is another one of those archaic words, no longer used. In modern "English" its now used synonymously with "hell". (For example, the third person of the Trinity is called "Holy Ghost" even though, the Holy Spirit is not a ghost as it used in the Greek. Pneuma and phastasma are entirely two different words with different meanings.)
Also, in your second sentence you rightly say that both the righteous and the unrighteous go to the same place upon death (although I might take issue with your "temporary holding place" as that implies a place where dead people are conscious, but that's a different discussion) but then I crossed out your last sentence because here you split the righteous from the unrighteous claiming that they don't go to the same place, contradicting your previous sentence.
So which do you believe? Do we all go to the same place upon death, or don't we?
Here is an excerpt from a research paper I did in seminary:
"But before any more is said on this, we must come to an understanding on what is and what isnt hell. Hell, that place the wicked dead go to be punished until the day of judgment, is not to be confused with the lake of fire. The Hades that Jesus taught of in
Luke 16:19-31, and the lake of fire that awaits the unbeliever after the great judgment day, are two different places, with two different types of punishment. In the passage of scripture where Jesus teaches us about Hades, when the rich man wakes up, we can see five things right off the bat about this place:
a.There will be torments in this place. (Lk. 16:23)
b.They will be in torments because of flames. (Lk. 16:23)
c.There will be an unquenchable thirst. (Lk. 16:24)
d.There will be no escape from this place. (Lk. 16:26)
e.They will be awake, alive, and have feeling. (Lk. 16:23-24)"
Speaking of Hell, posted in the Baptist area, 12/8/2010
Parable is defined as: "a usually short fictitious story that illustrates a moral attitude or a religious principle"
Source
There are some on this forum, that say you can't teach "doctrines" based on "parables". But based on the definition above, yes its is a "story", but it relates a spiritual truth. So I believe that what is said in Lk. 16: 19-31 is truthful.
If we take Jesus' words used in the Parable of the Rich man and Lazarus, we see "Abraham's Bosom. It has two "sides". One side shows Lazarus being comforted, resting in Abraham, while the rich man is in the "lower" part, or sheol/hades/hell.
We also learn there is "great gulf" fixed, between the two places. This is an example of what we see about "Abraham's Bosom:
Even if it was possible for Abraham to have mercy, Lazarus couldn't help him.
"And beside all this, between us and you there is a great gulf fixed: so that they which would pass from hence to you cannot; neither can they pass to us, that would come from thence." -Lk. 16:26 (KJV)
It is only a temporary place, as at the Great White throne judgment, it is "emptied" and itself, is thrown into the lake of fire:
"And death and hell were cast into the lake of fire. This is the second death." -Rev. 20:14 (KJV)
Today, there is a lot of mixed teachings about "hell" where some people "mix" what is said about the Lake of Fire with what we know about hell.
If you die, not knowing the Savior, you destiny is the same place as the Rich man. And you will stay there, until the Great White Throne judgment, where your eternal destiny lies in an even worse place.
God Bless
Till all are one.