Back in 1.x, ACL was able to craft fish into shards, what was how I leveled my FSH and ACL together.
The cheapest I can recall was 10 gils per shard in 1.x, and when you factor in the 10x currency reduction that is 1 gil per shard, or pretty much worthless.
No, it will not resolve any BOT issues, as BOTs can just go fish and now ACL them into shards. RMTs will just find something else to farm and make profit off of those items.
jc