Yes champaran satyagrah k awsar pe mili hui gaadi champaran route se to divert kbhi nahi hogi or ideally honi bhi nahi chaiye because after doubling plus electrification that route will also become very efficient ...But in NER region it can be shifted to main line post GKP as NUH and BLP doesn't share much in patronage and 12571 /72 is sufficient for the region.