I am not sure if this was discussed at any lengths, did not come across anything on my initial search except reference to a development guide.
I think a book, on linuxmce - kind of broad yes - would sell well, I will buy one for sure. I just came from by a partner of mine, who into networking/firewall and uses pfsense, who just bought a book they created on installing, configuring, ... pfsense (does not seem to focus on the new alpha), seems like its selling well.
I am on the belief such a book on linuxmce - not talking about a development guide, will gladly pay for that too - would sell well.
Just my two cents, no harm intended.