Decoupling HWH-CKP Exp and HWH-BKSC Exp is under thinking in SER as far i have heard. That will happen in comming years. Due to high demand of passengers in HWH-CKP Exp number of coaches in both HWH-CKP and HWH-BKSC is a point under thinking. But it can be that after decoupling, HWH-BKSC Exp can be Shifted to SHM and only HWH-CKP will be running from HWH.
Also another latenight train from HWH-BKSC via TATA is also needed to cater passengers of TATA and PRR and also alternate route BKSC passengers. Only hurdle is to park rake at BKSC full day, but that is also i think SER will find a way out.