Apart from the obvious requirement to rebuild their world from the surrounding destructions, the announcement that the law of Moses had been fulfilled would have been daunting. The law had told them what they needed to do, and now, what would they do? They are only given the bare outlines of the change. There will be a shift from communal sacrifice of animals to the personal sacrifice of one’s own broken heart.
More details would come when the Savior came, and taught, in Bountiful.