arrival @ 20.29 means it can easily depart @ 5.30 next morning...(9 hrs rest) @ 5.30 there isnt much crowd...now unnecessarily delaying the train for 8 hrs more means surely the next trip is going to be cancelled...that means ER have accepted that with limited resources,these trains can be cancelled any time
PS:No comparison of Kumbha with 2321,Kumbha has only 14 coach,while Mumbai Mail has 23 coach.