The Quran is only one from author and still 100% original Arabic unchanged.
Incorrect. The Quran is the writings of those who followed Mohammed, their version of what he said, just like the New Testament. It's never been shown that he ever wrote down anything.
As you say, it still exists in the original arabic, and many other languages as well. It's probably much closer to the original text than the New Testament, translated from Greek to Latin to whatever with the original texts no longer extant...
As to the veracity of the new idea of how to translate ancient Hebrew, who knows? Medicine didn't realize that ulcers were caused by bacteria until recently...

