Very well done paper!
Your paper is very well done. I enjoyed it very much! But, this is a very complex issue, and at the end I really enjoyed the following insight, that I've modified as it works both ways:
What if someone asked you, 'Is there a chance you could be wrong about the way you’ve interpreted the biblical texts sometimes used to prove homosexuality is not a sin?'
Which brings us to your other very excellent insight "Christians must be willing to hear what the Holy Spirit is saying about issues that come up in the Church and be willing to listen." Is either 'side' really confident enough to say they hear the Holy Spirit, and thus answer the first question you asked with a 'No'.
It seems the debate is pointless, as these arguments work for both 'sides'. I guess all I can do is genuinely throw myself at the foot of the cross, and ask Jesus to help me realize and work on my sins. Then the hard part, I need to listen for his answer.