Could we add another way to acquire materia other than spiritbonding?
For example: Add Cracked Materia* as a reward exchangeable through Allied Seals.

Cracked I - 100 Seals
Cracked II - 150 Seals
Cracked III - 300 Seals
Cracked IV - 500 Seals

This would allow players to make slow progress toward valuable materias such as determination and critical hit rate while doing weekly content such as the Hunt in order to cap their weekly soldiery.

*for those of you who don't know, the Calamity Salvager in each nation will exchange Cracked Materia X for a any materia of the same grade.

SECONDARY IDEA

Add Cracked Materia as random drops in treasure chests during dungeons mixed in with those X-potions and Hi-elixirs.