But Eve is not considered in the salvation process. In Adam all die
For as in Adam all die, even so in Christ shall all be made alive. I Cor 15:22
As for Immaculate Conception, you quote Gen 3:15
In your Bible, it says “I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel.”
However in Protestant Bibles, it says this:
"And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel." There is no she.
I have no problem with Isa 7:14
"Therefore the Lord himself will give you a sign: behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel." Mary was a virgin when she had Him.
But Matthew 1:25 says this "And knew her not till she had brought forth her firstborn son: and he called his name Jesus." He knew her not until means he knew her after that.
And this part is very perplexing
Luke 11:27-29
"27 And it came to pass, as he spake these things, a certain woman of the company lifted up her voice, and said unto him, Blessed is the womb that bare thee, and the paps which thou hast sucked.
28 But he said, Yea rather, blessed are they that hear the word of God, and keep it."
So, looks like from this that Mary is on the same level as others who hear and keep the word. This is why she needs a saviour too.