The LDS Church currently teaches they have the fulness of the temple ordinances and all that God intended to reveal on the subject. Again, I totally disagree. The LDS Church did not previously believe or teach they had the fulness of the temple teachings. That is a recent claim and is simply not true.
We Miss Singing in Church
Intellectually, I understand the idea behind the current restriction on singing in church, even though I disagree with the need.