Why will it ? It was introduced to provide dedicated service to CG & MP - BSP KTE JBP from SER - SRC KGP TATA ROU.
Diverting means entire purpose is lost.
If some other zone needs better they run their own service as Spl.
Comparison...
more... with SRC NJP is wrong. It's all about encashing Njp section which SER does run Spl since 6 7 yrs now. SER ER has understanding among them as SHM PNBE DURU (thru ER service using ) same way ER uses SER sec thru PURI Duru and rush period Puri Spl.