"“The Journal of Discourses deservedly ranks as one of the standard works of the Church, and every rightminded Saint will certainly welcome with joy every number (issue) as it comes forth.“ (President George Q. Cannon, Journal of Discourses, Preface, Volume 8.)"
http://www.journalofdiscourses.org/
It was never accepted, canonized, or sustained as such, despite that opinion.
Everything our leaders say is not scripture...and everything they feel should happen does not. On the Church’s web site it clearly lists the scripture.
I sustain the leaders we have...and they are good men, but they are men and not perfect. Over the years several have been excommunicated.
We each have the opportunity to exercise our free conscience in sustaining them...and hearing and listening to their sermons. When something is specifically recognized as a revelation and scripture, it is presented to the body of the church as such.