The children of Israel did not behold the face of God, would not recieve a fulness.  The lesser priesthood continued.

"Now this Moses plainly taught to the children of Israel in the wilderness, and sought diligently to sanctify his people that they might behold the face of God;  But they hardened their hearts and could not endure his presence; therefore, the Lord in his wrath, for his anger was kindled against them, swore that they should not enter into his rest while in the wilderness, which rest is the fulness of his glory.  Therefore, he took Moses out of their midst, and the Holy Priesthood also; And the lesser priesthood continued, which priesthood holdeth the key of the ministering of angels and the preparatory gospel;  Which gospel is the gospel of repentance and of baptism, and the remission of sins, and the law of carnal commandments, which the Lord in his wrath caused to continue with the house of Aaron among the children of Israel..." (D&C 84:23-27)