Sure, creation ex materia is something that is not unique to Mormonism, but the creation and how it came about is unique--that is the story of it is unique.
Your #2 is #1 phrased in different terms.
No its not. God is physical and works within the realm of eternal laws. to create via materials doesn't necessitate that God works within the realm of eternal laws, nor does it sugest God is necessarily physical.
Well, I'm not spelling out for you how the Mormon concept of pre-existence is unique. And by that it presents somethign quite unique on this problem.
Also, merely asserting #3 does not explain how a theistic God can be omnibenevolent. It does not explain the justice in holding us accountable for choices we do not remember making. It also fails to address why we were not given a choice to live in a world devoid of meaningless suffering, nor why we were not given a choice to reject the idea of an earthly life altogether and just remain with God.
My stating the unique Mormon concept of pre-mortality is not in some way descriptive of how it addresses the issue.
Your #4 is not unique to Mormonism, and is also a misstatement of Mormon doctrine. You are conflating "salvation" and "eternal life," which are not the same thing in Mormonism.
Now you're just quibbling about semantics. My use of eternal life is meant to suggest life that goes on eternally.
Your #5 is not unique to Mormonism at all. It is simply the basic idea of Christianity.
Not really. There are many a Christian who assumes God's atonment was far more limited. I don't know any who suggest Christ suffered the sufferings of all mankind.
Your #6 is merely a convoluted way of stating the free-will defense to the problem of evil. The free-will defense is not even close to being unique to Mormonism. It also fails to explain why God has to allow someone's free agency to do evil to me, yet by doing so God interferes with my free agency to choose not to have evil done to me.
There is plenty to discuss on this topic. I don't think you are seeing what I'm saying at all.