If I understand what you're saying, you essentially affirm that homosexuality must be a mortal condition because of inferences you draw from the temple ceremony and from Latter-day scripture, because of explicit statements by modern day prophets and apostles. Also, you're drawing inferences from nature.
However, your sense that there must be aspects of homosexuality that are eternal seem to be – correct me if I'm wrong – drawn from direct personal observation. Both from your personal experience, as well as direct experience of the world around you. You observe that homosexuals have certain “very desirable” “qualities, talents and characteristics, either inherent or acquired.” You suggest that “living as a gay man or woman in a predominately heterosexual world” is responsible for some of these traits (such as “humility” or “compassion” maybe?). But you list other traits that don't seem logically “acquired” and are good candidates for “inherent” (such as “sensitivity,” “color” and “arts,” for example?).
To me, it is first of all very interesting that your conclusions from observation and experience seem to pull you in the opposite direction from your conclusions based on “official teaching” or inference. That is my experience as well.
My experience also includes personal spiritual experience. My suicidal despair over my condition came largely from the fact that I was relying solely on official teaching, which at some very deep level left me feeling utterly hopeless and worthless. But when I did as James directs, and, lacking wisdom, asked of God, I got a very different kind of answer, i.e., “Your homosexuality is an inherent, created part of you that I know and understand, and that is good.” And so I was being asked by my Heavenly Father, in some very profound sense, to simply trust what he was telling me about my own created goodness – even though the world around me, particularly the world of official church teaching, radically disconfirmed that. That was in 1986, right after my near suicide and right before I left the Church.
My second experience was in early 2006, after I had started attending Church again in response to prompting from the Holy Spirit. And there was this very desperate moment where – again, aware of the profound disconnect between official teaching and my own personal experience – I prayed to God trying to understand. How could I have this witness from the Spirit that the Church is true and that I need to be there, when I also have had these profound spiritual experiences affirming that there is nothing wrong with me in my created nature and that my relationship with my husband is very good? I specifically raised the whole question of exaltation and eternal happiness, and how that relates to my relationship with my husband. I put that on the table, and essentially said, If I need to leave this relationship, if that is your will, I'll find a way to do it. It won't be easy, but I trust that you can lead me in the path I need to go. And again, the answer I got was very, exceedingly clear. Under no conditions was I to make any attempt to end my relationship with my husband, that to do so would be a sin. AND, I need have no fear for my eternal welfare or happiness. My Heavenly Father made it known to me that he was extremely pleased with me, and I need simply to trust.
I understand the extreme skepticism with which most good LDS in the pews (and on the stand in General Conference) will regard those kinds of spiritual experiences.
I also understand that, for most LDS, it is out of compassion and the “pure love of Christ” that they would urge me to quit my relationship with my husband (and that they go to the polls and try to legally take rights away from me and my husband). From the perspective of official LDS teaching, homosexuality is a mere mortal condition, and to try to build an eternal life based on it is just setting me up for stagnation and unhappiness in the life to come. I understand that.
You, however, have here and elsewhere stated that you have no problem with homosexual relationships; that it is not your desire to discriminate or take anything away from them. That seems out of harmony with official teaching. But it seems less out of harmony with your personal experience.
I'm not trying to embarrass you here... If anyone has reason to be embarrassed, under these circumstances, it is me. After all, you're the one being faithful. You're in good standing in the Church, and I'm excommunicated with no chance in sight of being restored to Church membership. And I've had to wrestle with all the doubts that come with being “out of harmony with the brethren” on a point that they seem to consider fundamental. But I don't find myself out of harmony with God. Which, given my testimony, is confusing and damned inconvenient. But there you have it...
But I am aware of a dynamic here. I've seen it in other churches besides the LDS Church. People who know and love homosexuals tend to be more open to the value and goodness of same-sex relationships. People who have no personal experience tend to be more judgmental, and less willing to tolerate same-sex relationships. Why does personal experience with this seem to complicate this question rather than clarify it? I don't think you can just write it off as being corrupted by the world... To hew the line, you almost have to blind and deafen yourself to real world experience, and that, to me, seems an unhealthy perspective for people of faith...