Sorry, Adamin, if I seemed to be too judgemental about the game.
But, as much as I love lore speculations, creativity and wandering in the vast spaces of the lore itself, I have to disagree with you
We are not talking about speculations, this time, but about something that significantly diverts from the lore, so that, as I wrote, it wouldn't be acceptable at this extent.
It's true that Tolkien's production presents various and sometimes multifaceted surfaces that seem to contradict themselves, and, as you know, I like discussing about this type of matters.
Though, the interpretation of the game is not just a liberty, but rather a vision that disrupts that
common law in Tolkien's lore; that common and shared basic structure upon which we often build our debates.
So, since I want to be generous, I will answer you point by point
1. Sauron is the greatest Maia ever existed, not really due to his physical strength and power (Ungoliant and Gothmog are likely to surpass him in strength), but, as the author reminds us, for his abilities, knowledge and
extremely dangerous deceiving plans and purposes.
As the greatest scholar of Aulë, he undoubtedly was the greatest craftsman in the specific period we are dealing with (the Second Age), no matter how Celebrimbor or Fëanor could have been skilled and renowned for their knowledge.
Sauron is the source of all the knowledge and 'input' that the Elves receive in the forging of the Rings of Power; it's Sauron the initial and ultimate pivotal actor of the whole process, especially because everything eventually turned out to his advantage (the One Ring and his Plan).
And, a bit off-topic consideration: Fëanor is indeed the greatest craftsman of all time (as we are constantly told in the Silmarillion), but I would rather see this title inside the dimension of the Noldor or the Eldar themselves.
I mean, this kind of titles often leaves me a bit puzzled when it comes to compare extremely powerful Elves to the Ainur (Maiar and Valar).
It's true that even the Valar could have never created something akin to the Silmarils, but it's also true that the Ainur's standards are absolutely on another level, having created Arda in the first place and other wonders like Valinor itself and the Two Trees.
And, as Tulkas (if I remember correctly) exactly reminds Fëanor, the Light that gives life to his Jewels is something that belongs primarily to the Valar, implying that they too could have 'claimed' some rights on the Silmarils if they had really wanted to.
Besides, I am manifestly a pro-Valar person, so it's definitely a very personal opinion of mine
2. Honestly, I didn't exactly get what you want to say when you talk about Celebrimbor's role in the creation of the One Ring.
And, to answer also your following point, as I previously wrote, I always regarded the role of the Elves in the forging of the Rings as a role totally subjected to the directives given by Sauron.
What I understand and think, reading the Silmarillion, is that Sauron (according to his famous and well known attitude and nature) never needed the aid of the Elves as a concrete help in widening and perfecting his knowledge; he had already conceived his plan from the beginning, as his false promises as Annatar (about recreating Valinor in the World) suggest.
He knew that the Elves of Eregion were delighted and skilled in those arts, but he needed them to have puppets to use in order to make sure that enough Rings of Power would have been created and distributed to each race.
Sauron is smarter than he seems to, I think: even though he didn't know about the secret of the Three Rings, he knew that his founding
secret formula would have affected every creation of that kind anyway, being him aware or not.
That's why he's always been a serious threat, because he always manages to drag everyone in his web, one way or the other
3. Celebrimbor was never aware of the One Ring until Sauron himself revealed his true intentions, nor did he ever contribute in the conceiving of any of its magical characteristics.
Keep in mind, also, that it's true that only the Elves immediately unveiled Sauron's true purposes (and that they are generally more farsighted than the other races), but it's also due to the fact that the other Rings had not been distributed yet at that moment, and Sauron waged war to Eregion/Eriador exactly to reclaim them.
4. I think I don't need specific quotes to explain the One Ring's particular traits; a lot of references speak for themselves, I guess
What I meant was that, once the One Ring has been created, its essence has always remained perfect in itself and utterly unaltered.
That means that the only things that can take place are the possibilities of the Master Ring surviving the flow of Time and keeping its integrity untouched, or it being destroyed and consequently having its essence annihilated completely.
I'm well aware of which effects it could have on different people, but everything depends exactly on those people's characteristics (as Galadriel reminds Frodo when he asks if he could have ever used the One Ring to dominate others); no one could do something in between, like altering its powers in any way.
The One Ring is Sauron objectified.
His final goal conceived from his imagination, come into existence and accomplished.
I don't honestly know how Celebrimbor could have ever had any role in this process; it's highly contradictory and wrong.
Adding to it, if that person you mentioned could really be able to overthrow Sauron, he would overthrow the 'physical Sauron'.
Sauron's Will will always remain bound to the One Ring until it exists.Furthermore, I think we could start other debates about the One Ring's true nature (I read that some people believe it kind of developed a Will on its own, different from Sauron's), but I guess it would be a too much wide discussion.
5. I would also like to add another point.
Celebrimbor existing as a Spirit in the Unseen and wandering throughout Middle Earth is highly improbable and contradictory too.
All the Elves are inevitably bound to pass into the Halls of Mandos as they die.
If their spirits are too mournful and don't deserve to be admitted again in Valinor as blessed Elves, they remain in the Halls of Mandos, mourning forever for their sad fate, as it happens with Fëanor, his Sons and other Eldar.
Along with the previous points, this game's vision contradicts too that
shared/common basic structure of the lore I referred to above.
That's why I can't accept it.
You know that I'm not at all a Tolkien purist, but I can't personally accept it anyway