I think my actual position is a little more nuanced than what you think OSAS is, Jason, but I'll bite.
Answers:
1. I'd like clarification by what you mean by 'out of fellowship', but I would say a saved person will always seek fellowship with other believers.
2. Yes. One's salvation is not contingent on repenting of every individual sin. By your logic, would someone who died suddenly without repenting of a specific sin, or even being aware of a specific sin they had committed, be condemned entirely on the basis of that specific sin?
3. I don't see what they have to do with each other. Care to explain your reasoning?
4. How is Jesus' 'sinning no more' compatible with the other writings of the gospels, and in the letters of Paul and John in particular, where continued humbling and repentance, as well as a continually movement towards being more 'Christ-like? The answer is: a saved person will feel convicted to move away from sin, and will be convicted to repent, but that does not mean that we suddenly become unable to sin, or that our salvation is contingent on no longer sinning.
5. Repentance and confession is more than itemising sin, but about much more. It is about recognising our sin as a part of our natures, and not merely a series of acts. that does not mean it is not good to confess individual sins, but our forgiveness is not contingent on itemisation. The fact that the blood of Christ covers over our sin is not a license to continue sinning - quite the opposite.
6. It comes from God through the believer, who is regenerated not by their own effort but by the gift of God. I don't think I've ever accused someone in believing in Works Salvation because they believe the fruit comes from God, so I'm not sure what you're getting at. Sounds like a non sequiter to me.
7. To do good, of course. And yes, God wants us to live in holiness.
8. I don't think the point of the prodigal is talking about that. Parables, like metaphors, are not meant to run on all fours. The point of the story is the son being forgiven despite all the material wrong he had caused his father. Was he saved when he went prodigal? I think that's beyond the scope of the parable. It's a fun question, tho, to consider whether he was ever going to NOT come home
And yes, I think goodness and morality are extremely important. Paul tells us God has saved us by grace through faith to walk in the good deeds he has prepared in advance for us to do. That is, at least in part, the point of our salvation.
9. Easy - he doesn't. But the point, of course, is that sin still exists. That's just reality. And even Christians still sin, no matter how less frequently.
10. They are changed, or at least should be. That doesn't mean that a believer magically becomes perfect - if that was a requirement, there is not a single true believer who has ever lived.