One of the central principles of what I call "pure Mormonism" is that God gives revelation regardless of religion or denominational affiliation. It's the "bring it with you" concept - that if someone understands truth in a different way (or even an unknown truth to the Church at large), it's accepted simply because it's truth. Hence, "seek learning out of the best books", "even by study and also by faith", etc. Truth is all around us, if we only have eyes to see it and hearts to understand.
As organizations grow, they tend to minimize this, however. There tends to be an idea that we now have it all - even if that isn't supported (and even if it is rejected) in our canonized scriptures. It's just natural calcification, and it just makes change harder and slower than when the organization was smaller. It's a security trade-off for the free-wheeling discovery mode of the early time. It just is what it is.
The last books of the small plates of Nephi are interesting in this regard. Space on the plates was running out, and, paraphrasing the words of one of the writers,
"It's all been said. I don't know anything new. I'm just signing this to show that I took my duty seriously."
Our plates aren't full. We have plenty of available space.