To me, this whole thread underlines the confusion around 'sacred' LDS ordinances that baffles me.
They NEVER change, and cannot be altered - because that led to the apostacy. Until they are changed - then it is not apostacy, but a testament of the true and living church!
The sacrament is vital, and members should come every week to partake of it - but its not that important on stake conference, general conference, or any other approved weekend.
I offer this: the crux of modern LDS belief is to follow what leaders say today, and ignore what has been taught in the past.