The Tanners discuss various changes to the temple endowment.
Jerald Tanner and Sandra Tanner, Mormonism: Shadow or Reality? 5th ed. (Salt Lake City: Utah Lighthouse Ministry, 1987), 474-83
The fact that changes have been made in the Mormon temple ceremony can be demonstrated by comparing earlier accounts with the one published in this book. Some of these changes were made after the turn of the century.
. . .
Conclusion
In this chapter we have not only shown that the Mormon leaders have given up the ordinance of sealing unrelated men to each other, but that they have made important changes in the ceremony where women are sealed to men.
After careful examination of the temple ceremony, we have come to the conclusion that it bears unmistakable evidence of being a man-made ritual. The fact that so many changes had to be made in it to try to make it acceptable shows plainly that it is not from God.