jane,
I think God stopped giving public revelation after the Apostolic age for a good reason. He already knew that just coming up with a final canon of Scripture using imperfect people, was going to be a challenge for us by itself, even with the guidance of the HS. If you study how it all happened, you see that even in the first century or two, many books, gospels, and letters were circulating, most of them turned out to be non-inspired or spurious when it was all said and done. I believe that God gave us the complete package up front, what was required to believe for salvation, Jesus, The Way, The Truth, and the Life. And then He let the Church spread the Good News to the world. The Church has not failed in its mission. The gospel did not need to be “restored”, it was always here. When Jesus said He would not leave us as orphans, He sent the HS to be with the Church. We don’t have to be getting ongoing divine revelation, as in new teachings, to know that the HS is with the Church. Jesus said “Trust in Me.”