1. The living God has devised a test of will. Either you choose His, or you choose your own. If you reject His will, you accept the alternatives that rejection brings. In this case, you accept an eternal separation from Him. That is what He has 'preached' from the beginning.
This is what is called a false dichotomy. Not only that, it is contradictory--either choose the Bible, a man made collection of man made documents, or choose the way of man. It's choose man or choose man! As someone who feels the glow of God without the crutch of nonsensical superstition and illogical explainations, I find this supposed choice insulting. There is no test of will. There is only the continuing stubbornness of man thinking he can control that which is beyond him. God is there, and there has never been any rejection.
I think the true question that was asked here was one concerning the "seperateness" of God the Father and Christ, of how somehow God could not save humanity without following some ridiculous barbaric ritual. Without blood God's hands were tied. Can you really imagine God's hands tied?
2. The creation of sin has been addressed ad nauseum, always with the same results. God created free will. Free will has potential (not guarantee) for transgression.
What you call "free will" is actually man turning his back on God. For man to think he has complete control of his self and environment is for him to consider himself a god equal to God. Unfortunately, those people who begin to realize the truth of this often turn towards the Bible without realizing that the Bible is a false idol that shows the "will" of man, not of God. God does show His face everywhere, however.
3. No. God is described as good of intrinsic value; in His case, the value upon which all good is measured.
Described by who? By what? If God is so good, why the slaughters described in the Bible as being in his name and even commanded/caused by Him? This is the ultimate insult on God, in my opinion. Evil comes from man, and as long as we continue to embrace ourselves as gods and ignore God we will continue to bathe in it.
In a way, though, it could be correct to say that God created evil as he obviously instilled in man the ability to turn away from Him.
4. Yes.
So? Nothing else to say? You continuously ignore the real questions asked and replace them with strawmen.
5. Jesus' work on the cross took away the penalty of sin, not the presence (although such a sin-free environment waits in the future).
See my comments in the first section above. The whole concept that God needed to follow any procedure to do something is absurd, not to mention that if there were to be a procedure that God would be forced to follow it seems unlikely that that procedure would be the cumulation of a barbaric culture based on blood sacrifice.
Sin is part of us now as it always has been. God is not upset, however. We must always remember that we were not kicked out of paradise--we ran away, and continue to run.