I got this idea suddenly while I farmed for water shards for craft.
This game is hugely craft-centric game in my opinion.
So, why not make shard exchange NPC to make craft bit easy?
It won't be 1 on 1 rate, 2 or 3 for 1 other shard.
It will also use up huge surplus shard users will have. ( to me, it's earth shard )
Anyway, although I'm pretty sure that SE won't implement similar NPC at retail release,
What is other's opinion about this?