I enjoyed it. It was sensitivly written and although I can see how some could call it 'Mary Sue' in spite of that, I enjoyed it. Lothlorian is one word, however, not two.
I don't think it was deserving of so many bad reviews as the writing was elegaic and attractive.
Also, may I add, as a peeve about your first reviewer here, yes, Tolkien was a Christian but this world he created was a pagan world, which shows he had respect for other religions and ideas outside of Christianity. It seems you were taking a shot at the fact that it was two girls in love, which is wrong. Tolkien would not have disliked a story for that reason, his mind was too open. The morals were intact in this story which is why it works, IMO.

Well, I read through this grammatical nightmare of a Mary Sue in which Arwen and Tolkien were brutally canon raped and I must say: What were you thinking?
FYI Lothlorien is one word.
To your *cough* "original" character's credit, at least she dies. That's about the only redeeming feature she or this story has.
There's a longer review here: http://livejournal.com/community/deleterius/394719.html

Me, I like slash. I slash characters together all over the place. But good slash is not just about sex, its about bringing two canon characters together in a plausible, interesting way. It doesn’t even need sex to be good.
By creating a new character to slash Arwen with, you ruin the point of slash, at least to me. Also, you’ve completely killed canon, and Arwen’s character. Arwen is hard to write slash about, because so much of her character is ABOUT loving Aragorn. As far as I can see, you haven’t delt with this fact, and that makes your story very hard for me to take. You can’t just A/N him aside.
But you have talent as a writer. I suggest you write a new fic, perhaps with a different pairing (it can still be slash, but not canon character/original character. And I’d stay away from Arwen too.)

Great thing you have updated so soon! Keep on with the good work.

I have to admit that you are a talented writer; however, this is the only thing that I can find in your story to praise. Elrond is completely out of character; I honestly cannot believe that he would be so uncaring toward his only daughter, especially after she had nearly died. His behavior toward Arwen is not only rude, it is sexist, and one of the most common cliches in LOTR fanfic is that Elves are sexist (which they are not). And by the way, it is also a common cliche to make Elrond into a horrible, abusive father, which he is not.
Arwen herself is also out of character; she is not homosexual: she loves Aragorn, and ONLY Aragorn. What you have done to her character is not the Arwen that Tolkien created, and that Liv Tyler portrayed so beautifully. There is a fine line in writing fanfiction; one has to be true to the characters, but like real people, they can change, mature, and grow. Character growth is a different thing than twisting an established character inside out and simply keeping the character's original name. Character growth makes the character more interesting; character mutilation (AKA character rape) destroys the character.
Also, your OC (original character) has a non-Elvish name, when she is supposed to be an Elf. Gaelic is not Elvish, so please do not make it into a substitute for the actual language that Tolkien created.
On yet another note, I must add that if Professor Tolkien could be able to actually read your story, he would most likely be extremely offended. Tolkien was a devout Catholic Christian and would find 'Arwen's' behavior in your story to be a gross insult to his moral values, which he so skillfully imbued into his tale.
In closing, I strongly urge you to rethink continuing this story.
Varia Lectio