Yet VII's materia system was utterly broken due to some of the parameters not actually working and made everyone the same damn character because everyone could summon/cure/etc so it's not good for an MMO envrionment, hence why they got rid of absolute freedom :\ I'd adapt the Nyzul and Einherjar system. Random dungeon layout + puzzles + fighting till you gain access to Odin while gaining currency to buy shit you actually want?

Sign me up for a good system.