Shouldn't we consider:
- What would happen to the Scribes if no Mages were allowed to be Scribes anymore? Sounds like a death sentence; the opposite to what the Scribes need at the moment.
- How would new mages come to be? What would be the funnel into the Mage guild? Future aspirants now at least have the possibility to build onto something (Alch/Scribe) while they are waiting. And it's a long, long, loooooong wait.
- What do upcoming mages do in the game if they lose access to all those services?
I'd be wary of introducing new elements that separate mages from the rest of the game even more than what they already are right now. This can easily backfire when mages have noone else to interact with than other mages (ahem, I mean even more than they already do). Mage players are notorious for not being around much. I can easily see this turning into requiring the stablishment of a new Mage-y location (which could work) or Mages suddenly having to do magery talk in pubs (which shouldn't really happen). Or *shudder* Asador becoming the new capital city of knowledge of Forostar.