The policy/doctrine/revelation distinction is basically worthless at this point. Teachings throughout the history of the church have been changed whether they were prophetically deemed policy, doctrine, revelation, unchangeable, eternal, etc.
Many of the old timers here probably recognize me as I was pretty passionate on this topic some years back. Haven't participated much in recent years. I'm still a very active member but saddened that about half of my extended family have distanced themselves from the church. The leaders' LGBT teachings are a primary reason why.
I figure that nothing is going to change as long as Pres. Oaks is alive and I assume he'll continue to beat this same drum in at least one conference every year. I continue to believe that we are a couple decades away from gay marriage being fully accepted in the Church. I suspect, by that time, very few of the rising generation in my extended family (40 nieces/nephews) will still have the church as a significant part of their life. It will be too little, too late.