Pipe dream or not I like how energized and inspired you are by this game and it's Mythos theme!
I shouldn't be surprised considering the occult nature of your avatar! I too share in your enthusiasm for The Hermetic Order of the Silver Twilight
and feel that an exfansion to even up the numbers between it and the other 7 factions is a good place to start. Perhaps repurposing CCG art towards this goal is doable?
On the subject of Aleister Crowley, he could only be ST considering his historical connection to The Golden Dawn. He was arguably it's most visible member but was also intimately
responsible for it's ultimate demise.
I perceive ST to be much like an onion. On the very outside of the organization you have your dupes who pay their membership fees but have no clue of what is going on
within The Order's inner circle. Beneath that layer you have politicians and businessmen 'local and big fish' who want to use The Order's growing influence to further their
own careers but don't realize that they are dancing on the puppet string! Further into the onion you would have criminals that do the dirty work for The Order and further still are the members
that have some arcane/occult/Mythos knowledge and hope to advance in skill and rank within The Order. Many of those members are merely fodder for The Order's many rituals but some advance to
the inner most circle. Advancing to the inner circle not only grants a member greater knowledge and power but they also gain anonymity. They become to some extent puppet masters who rarely
emerge from the shadows and through a secret chain of command have other members do their work clueless to what master they serve. - This is a synopsis of the proposal my playtest group
submitted when we were asked for our ideas on a 8th ST faction. Our concept was not thoroughly implemented but slowly ST has evolved into a decent faction. We actually tried to talk FFG out of TOotST
and offered a counter proposal that they ultimately passed on.
The role I see A. Crowley playing is as a rogue member who advanced somewhere into the middle of the onion and is now using what little knowledge he has gained to go Independent and is bringing
unwanted attention to The Order. His ability would represent a character of moderate power (Dirk Sharpe-Magical Theorist) living on borrowed time. Perhaps an ability with a 'sacrifice' cost?