1) "The joy of the Lord is my strength." Nehemiah 8:10. In context, Nehemiah is telling the people not to grieve as they hear the law being read, but to rejoice. How can one rejoice when the law is read? You can rejoice in the Gospel, but in the law? Maybe we don't understand the law rightly to think of it as just what we're supposed to do or not do. The Torah also shows the mighty God making covenants and rescuing his people, that is certainly "rejoice-able."
2) The title "Lord of Hosts" reflects God's power. But what do the hosts of angels add to the power of Almighty God? Nothing, really. Maybe "Lord of Hosts" really ought to be a sign of God's gracious willingness to give lesser beings significant roles in his plans.