FWIW, I'm totally cool with whatever beliefs anyone wants to hold, as long as they don't declare "holy war", harass, or assault others. And as far as LDS doctrine is concerned, I am "apostate" by certain definitions, for not believing in the divinity of a lot of what is taught. But I make no claims to authority outside of my own moral compass and experience. I fully admit I might be (and probably am) wrong about many things, and have been wrong about many things in the past. I'm willing to change my mind, as my experience develops.
But I am highly skeptical of ANYONE who makes claims to Authority and Revelation from God. If it's personal revelation, you do you. If it's for the Church, "Any True Follower of Christ", or the world, it makes me skeptical and squeamish. I am perfectly content with the "revelations" coming from the GAs over the pulpit at general conference. It is mostly basic, good advice, mingled with story and parable. Beyond that, it is policy. I might not agree with all of it... I might not enjoy all of it. But it is mostly good, mostly useful, and I appreciate it.
Compared with the Snufferites, their study guides, or "How To Have Your Second Comforter by Anonymous"... those books and doctrines remind me a lot of the "Journal of Discourses" and early Church Conference Addresses. There are a lot of unsubstantiated claims, a lot of deep (no offense, but I'd call them worthless), unprovable, inapplicable doctrines. A lot of mysticism. A lot of appeals to authority, mingled with claims of condemnation to those who don't believe. With all due respect, they feel manipulative. I can be a modern "Stay LDS". But I could not be a "Stay Brighamite". And I could not possibly be a "Snufferite".
"The whole world is a comedy to those that think, a tragedy to those that feel." - Horace Walpole
"Even though there are no ways of knowing for sure, there are ways of knowing for pretty sure."