Margaret Barker's writings suggest there was some very ancient covenant, along with an ancient priesthood that Christ was returning to the earth through His ministry. The New Testament church was not the objective of either Christ or Joseph Smith. Both were engaged in returning "that which was from the beginning."
Joseph's restored Temple rites are set in Eden. The quest to find God runs through the earliest contact between God and man involving the experience of the first man, Adam and his wife, Eve. They lived in God's presence at the beginning and the Temple message is that we must return there. Our quest is not to stop with a partial return, but a complete return to the beginning.
We tend to think we “have it all” and we got it from Joseph Smith. We have a New Testament church which is by far better than any other form of Christian organization, Catholic or Protestant. We tend to think that was the object the Lord had in mind when Joseph was spoken to from heaven. Then we claim to have preserved it perfectly from then until now. I’m suggesting two things: First, Joseph may not have given us everything because he died before the Nauvoo Temple was completed. The Lord's planned visit there did not happen. We got a lot, to be sure. Whether we have "that which was from the beginning" in the full panoply of what may have been received had the Lord come to restore the fullness in the completed Nauvoo Temple remains an interesting matter worth at least contemplating. Second, we may not have perfectly preserved what we were given. After the November 1845 to February 1846 endowments ended, the endowment was not performed again until 1855. It was not reduced to writing until the 1870’s. Several of the church leaders remarked at how surprised they were at how much Brigham Young could remember. That does not mean it was perfectly preserved, only that the volume of recalled material was surprising to them.
I think the path to God will run back to the very beginning. It will involve a return to the the original, paradisaical glory which was Eden. Zion is connected to that very return. (See, e.g., Article of Faith 10.)
This is why I made the remark. It is my view, and certainly not the view of many others. You are in very good company if you think otherwise. We are, after all, allowed to believe according to the dictates of our own conscience, and are free to exercise that privilege according to how we each understand God's will and intentions. (See, e.g., Article of Faith 11.)
I like the idea that if an idea troubles you, then set it aside. It is either true or not true, and you are not yet in a position to comprehend it. Either way, it is not for you. Since we are all in the search to find our salvation before God, I trust God will deal with each of us in His patient, benign way and the truth will unfold before each sincere seeker. Until God in His wisdom makes a matter clear, no one should presume they can rush another person into accepting it.
I also believe the Lord will not leave the sincere seeker uninformed. He will not answer one person and deny another if they both ask and do so in sincerity willing to accept the answer. Any person who comes before God acknowledging He is a God of truth and cannot lie will learn the truth from Him. (Ether 3: 12.) That also means if you are not willing to accept truth from Him, but require Him to meet you standard then there is really no point for Him to clarify things for you.
I am personally satisfied that the objective of returning to the most ancient, original faith, both was and is the purpose of Joseph Smith's calling. And that objective remains an unfinished work. It will finish, I think coincidentally with establishing Zion.