First of all, I don't know if DPS Roles is the right place for this (since SMN is a dps but the glamour itself has nothing to do with the role) so if it's supposed to be in another place, please tell me.

I believe that if SE restrict egi glamour, it will actually allows them to create more glamour. It may sound counter-intuitive but trust me on this. Currently, SMN can glamour their egi to any carbuncle (Garuda to Topaz for example) but this actually limits the option for their glamour because now SE MUST make a glamour that can fit all 3 roles for the egis (and at this point, only carbuncle fits the bill).

If they restrict the glamour so they can only glamour by role however, I believe that this actually allows SE to make more glamour. For example: Garuda can only glam'd as Emerald Carbuncle, currently this will be a restriction, but this allow them to create another egi to be a glamour, for example: Ramuh-egi. Ramuh is an obvious spellcaster type, so his egi will be a caster type as well and can't fit all 3 roles. Limiting what glamour Garuda-egi can use will allow SE to create Ramuh-egi for Garuda.

This of course, extends to the other 2 egis. Example: Ravana-egi for Ifrit or Bismark-egi for Titan and so on.

Of course, this is just my opinion, I want to hear what you guys think about this.