What about a smaller currency than diamonds. A craftycoin. There would be a villager at spawn that would only have 2 trades. 1 diamond = 9 craftycoins or 9 craftycoins= 1 diamond. Somehow make the villager never lock out. This would allow, the re introduction of craftycoins and a currency with value tied to diamonds that is smaller than diamond. The craftycoin could still be what it used to a sunflower with lore on it proclaiming its value. The new craftycoin would function kind of like a diamond nugget if they ever add such a thing.