Routing via CBE takes more time means, then let SR divert all the trains running via TVC from NCJ towards MDU, so that travelling time and additional fare can be avoided.
In such case NCJ-SHM,TEN-HAPA,DBRG-CAPE,TEN-BSP,Himsagar,CSTM-C APE can be routed via MDU which are running in circuitous route than the available short route.
So running via CBE is not going to be a major loss.
Also...
more... I guess the quota for CBE will remain the same as PTJ had earlier.