Ephraim surrounds me with falsehood, And the house of Israel with deceit; And Judah still us unruly with God, And is unfaithful to the Holy One.
All of the intimations of some great holiness in the future for Israel in this chapter are to be understood of the New Israel in the kingdom of Christ.  This is made starkly clear by a review of  Hosea 2 where Gomer's return as a slave to her former home was not the prelude to a remarriage of the prophet with her.  There is another wedding, to be sure, but it was to be with the New Israel, not with the old one.  That is why Gomer was not mentioned in connection with the nuptial scenes of  Hosea 2:14-3:5.  She represented the old Israel, not the new.