I think church doctrine is devolving, rather than evolving. It's getting to be less and less, almost as if the unique doctrines of the LDS church are disappearing. Adam-God? We don't teach that. Man progressing to Gods? We don't teach that. Eternal polygamy? We don't teach that. We don't teach much of anything that's unique anymore, except the stuff that doesn't matter in the eternities: what you ate, what you drank, how many earrings you had, what color your shirt was on Sunday... We spend an inordinant amount of time bustling around the inconsequentials, very little time on the basics, absolutely no time on anything beyond the basics, and altogether too much time worrying about money and numbers.
No offense to the masses, but I think this is a biproduct of the church becoming larger and larger. I think the church still believes in many of these ideas, but they do not "teach" them (ie, openly speak of them in church or public) because most people cannot grasp these concepts. The church has had to boil down to the lowest common denominator.
The church is not growing. Spoken like a true sucker.