Thanks for sharing this. So much depth behind each of these. Multiple life-times worth of work spent by very Godly men exploring each of these, but this page is so accessible. Very neat source.
1) I don't find that these are all mutually exclusive. It is probable, in my opinion, that the truth is likely some mix of most if not all of these.
2) The entire subject is so full of paradox that the full truth is likely inconceivable to mortal, temporal man.
3) Getting the "model" of atonement "right" is not really all that important, in my opinion. There are clear facts about atonement that are easy to understand and irrefutable (from a theological perspective anyways). The critical aspects are that man was lost to sin without the sacrifice of Jesus, and through Jesus' sacrifice, man is saved. The "how stuff works" explanation of why is not nearly as important as the fact that it does work.
4) I would add that I am hesitant to limit God's power to saying that Jesus' sacrifice was the only way that God was capable in bringing salvation to man. When Jesus heals the paralytic man, he tells the man that his sins are forgiven. When Jesus sends out the apostles, he gives the apostles the authority to forgive sins in his name. I find it dangerous to believe that the only reason that Jesus was able to say these things is due to his pending death. It puts a limit on God's power, which I am uncomfortable doing. Arguments like "this is the only way that the story of atonement makes sense" has the effect of putting God in a box in order to make him conceivable to our limited, rational mind. I fully believe that Jesus had the power to forgive sins while he walked on the earth. He tells us this directly.
However it works, thank you Jesus and thank you God for providing us with salvation that works!
It takes a special kind of brainwashed useful idiot to politically defend government fraud, waste, and abuse.