I think it’s a very good idea to convey the sense that all three of these groups have a similar problem with sin, but don’t lose their innate dignity as persons as a result of their temptations. EVERYBODY can relate to the temptations of at least one of these categories. Equating them combats the genuine homophobia that occurs in some places in the church where both the sin and the sinner are despised as if members of a completely different (and more heinous) class of sin.
I’m not sure what people consider “new” about the idea that “parts” of same sex relationships are genuinely good, moral and virtuous. I was taught way back in grade school about how the English word “love” covers at least THREE words in ancient Greek: Filia, Eros and Agape. The fact that physically erotic forms of love have no moral or constructive place in a relationship between two people of the same sex doesn’t remotely negate the virtues of Agape or Filia in those relationships. This, in fact, is probably why actively gay people have such a hard time accepting Christian teaching on the matter. In too many places, they are told that their relationships have no redeeming value whatsoever, an assertion plainly untrue in their own experience. (I wonder if this is also why lesbian relationships, at least, tend to rather quickly phase out of the erotic phase of the relationship?). In any case, this seems less to me like something “new” and more like a re-emphasis on something very old.
I do, however, still have a very grave concern that in attempting to be pastoral, some church leaders are still naïve in terms of assuming that their actual ideas will be given fair hearing in the public and press rather than snippets being taken out of context by people wishing to rationalize their sins into virtues. Nuance is a good thing, but it cannot be grasped by people who have not yet begun to comprehend fundamentals. And it especially won’t be understood well by those unwilling to comprehend fundamentals.