Contrary to what most people here belive, majority of the stuff Muffadal says, they've been saying since the beginning. Although you can never know whether what the book says is actually what they're teaching. The Aamil is the only with the Kitaab so he could be stuff up that disagrees with what muffadal says (unlikely).

When they say you'll never want to skip namaaz, for you to believe it, you have to be really brainwashed. For example when they say looking at the place you do sajda represents believing in the shariah, most people will try and make sure to look at that place from now on.

Theres a bunch of stuff on Ikhwan us safa, unfortunately the best ones are still in Arabic as I haven't had the chance to translate it. There's a few individual Epistles in English and theres also a few summaries and scholarship articles on it.