First, the rules on adults have not changed which means that an adult leader can be gay so long as they do not wear their scout uniform to a gay pride event. The current rule (that will remain in effect) is a very strict form of don't ask, don't tell where you have to do a great deal to get banned. As a practical matter, the charter organizations who are comfortable with homosexuality will not ask and any homosexuals who want to be a leader can be a leader so long as they do not wear their scout uniform to a gay pride event. Back when I was more active in my district, there were 8 to 10 senior leaders who were gay and no one gave a darn. Three or four of these leaders were at my scoutmaster fundamental training.
The change in the policy as to scouts is a step in the right direction. Ever since the Dale case (the SCOTUS decision involving a gay leader who did wear his scout uniform to a gay pride event), there have been leaders working on changing the BSA policy on this issue and progress is slow but steady.