I like to think that we're growing up as a church and allowing for more variations of belief and practice.
I also think in a weird way our religion is having to speed up it's teen year procedures. Other religions took hundreds of years to move to their current system. I also think Mormonism boils down to different strokes for different folks. If you really pressed people you would get different answers - eternal families, becoming Gods, sealing ordinances, saving the dead, being Christlike, spreading the gospel. Sometimes they overlap or we pick 2 or 3 without even considering it.
In my lifetime alone (and I can remember David O McKay's death - DJ I win.) we have swung from, being another Christian religion (McKay), Geneology and Family History (Joseph Fielding Smith), Food Storage (Joseph Fielding Smith and Harold B. Lee), Lamanite Children, Journal Keeping, Long Life Lists (Spencer W. Kimball), Pride and BoM (Benson), Temple Recommends for everyone (Howard W. Hunter), History, Temples, PR (Gordon B. Hinckley), Ear wiggling (Thomas S. Monson).
Mormonism is like the tide, it comes and goes. We've left the city of Zion behind - That was our forefather's dream.
"I stayed because it was God and Jesus Christ that I wanted to follow and be like, not individual human beings." Chieko Okazaki Dialogue interview
"I am coming to envision a new persona for the Church as humble followers of Jesus Christ....Joseph and his early followers came forth with lots of triumphalist rhetoric, but I think we need a new voice, one of humility, friendship and service. We should teach people to believe in God because it will soften their hearts and make them more willing to serve." - Richard Bushman