While I personally think adding Astral Shards to the game (and the Shard Exchange) was a terrible idea, I accept that it is what it is, and it's not going away.
What I would like to see added are:
1. Astral shard treasure drops. Maybe this is a thing and I've just never seen it, but Astral Shards should be potential drops in treasure chests. The amounts would be based on the quest level, modified by the difficulty level (Hard difficulty as the minimum). Like level 1-5 quests might have a chance to drop 1 shard on Hard, 1-2 on Elite, 1-3 on R1, etc.
2. VIP Shards: VIP accounts should get 1 shard per day added to their account.