I want 2.2 to be a "reset" for players in full i90 gear. Make Turn 6 a distant goal.

[Nova_Dresden]

there is a simple way to avoid that: make synthesis materials only drop in raid content.

Still doesn't negate the other factor: RMT. If a raid drops synthesis materials and you craft a raid-level piece of equipment that opens the door for people to buy gil in order to afford your pricing of said item. Either way the stance on crafting is still that nothing craftable will be comparable to a raid drop.