Given Hazaribagh's historical as well as current importance, after the Kuju-Ranchi Road link up is complete, a Vande Bharat could be tried out between HWH/SDAH & HZBN.
Hazaribagh has a lot of prospective travellers, the plethora of buses running too and from it, gives a brief insight into it's capabilities.
A dedicated connectivity from HZBN with the biggest city in the region, is definitely the need of the hour!