The Hinterlands could kind of use an Aetheryte

[Hypie]

This was a design choice. In lieu with keeping Heavensward challenging, Yoshida said that there'd be fewer aetherytes so that you can't just warp everywhere.

Whats challenging walking in and out of a pacified zone? But Idyllshire has a Aetheryth. You need to repair him via a Quest from a Goblin. Well i didn't try resonancing before so maybe it works anyway...