I am a “lurker” on an Internet message board where LDS historians and others speak about “doctrines that are going away” (their words, not mine.)
Q: How can a DOCTRINE go away? A practice, yes. But a definition of God shouldn't “go away,” right?

Here's another quote (which I assume is tongue in cheek, but telling):
“Mormons, we used to be peculiar, but ever since 1995 we have been just as normal as you!”

For more information, see The Mormon Mirage 3rd Edition:  A Former Member Looks at the Mormon Church Today (Zondervan, 2009). Also available as an audiobook and as an expanded-text E-book for Nook, Kindle and other reading devices.