The dravanian hinterlands is actually filled with the ruins of the city of Sharlayan. Those broken aetherytes are just for aesthetics, to give you the sense that there was once a thriving city there.

That being said, I think it would be really cool if the goblins eventually rebuilt Sharlayan (including but not limited to Idyllshire) and restored those aether shards as well as added other interesting things to the dravanian hinterlands region. Goblin beast tribe camp area comes to mind.