Well, let us say that if the OT is interpreted in light of the NT following the examples of Jesus and Paul, then it can be viewed as preparing the way for the Gospel of Christ. The Law of Moses revealed our sinfulness, the Sacrificial System pointed to Christ's atonement, and some of the prophets revealed that God's Plan of Salvation (POS) included the Gentiles.
I want to consider whether we should allow the angels to become less important as the Holy Spirit becomes greater, as John said with regard to Jesus in JN 3:30. IOW, we should wait until heaven to understand how angels fit into God's POS, (along with other problematic passages in the Bible, such as baptism for the dead, the genocide by Joshua, the interpretation of RV, and whether Joseph may be called the Father of God if Mary is His mother). IOW, just as the NT superseded the OT per HB, it is not a matter of replacing the angels but of keeping them in their proper place.
I realize that this concern is not addressed in the NT, but I find hints and implications as I have indicated.
Over...
Thanks GWH for your comments. I don't see angels as becoming less important. The saints, who are angels, are still important. However, if you mean not to worship the saints, the angels, then I completely agree. We worship God and not each other. Since I believe Jesus is the angel of the Lord as well as the archangel, worshipping him is OK, if it is in the sense of worshipping God. Angels, however, are not less important now than they were before. Revelation, for example, is full of angels. We, as saints, have come to this in Hebrews: "But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect, And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than
that of Abel. "
To me, this means that we in Christ have come to a gathering of saints and to Jesus. The saints are important, of course. So much so that Jesus came to save the people who are the saints.
My main concern with angels in the Bible (including the New Testament), is that people have traditions of men, and these traditions of men have interpreted angels verses, in many cases seemingly incorrectly. That hurts the ability of people to understand what the Bible means, what it's message in various verses is saying. If you know that Jesus is the archangel, you can interpret verses about him correctly rather than incorrectly. If you know that 'angels' is a word for the believers in the Bible, then you can understand what verses that mention angels means.