Bro even Coalfield stops at all the aforementioned stations and you can't question DHN's handling.
On the Grand Chord DHN always gives higher priority to an SF when compared to an express and that a legend like Kalka will always get a higher priority...
Rather I would question ER's handling of 12340. What the hell is ER doing with Coalfield. Everyday Coalfield is arriving Howrah an hour late inspite of Departing right time from Dhanbad...
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Asansol Division is delaying this premium intercity with some useless pretense inspite of having 4 tracks...
I know some of the decisions made by the RB have incurred the wrath of ER & SER based railfans but one directional criticism is not right...
When ER itself cannot prioritize it's premium intercity that runs on 95 percent of ER tracks it is unfair to criticize DHN. You may criticize ECR but spare the criticism on DHN & MGS. Whatever iota of punctuality ER trains have is primarily because of the phenomenal controlling by DHN & MGS and HWH (Chord line). Rest of ER's controlling is not as proficient, ASN is a major troller, it delays most of the on time traffic it recieves from DHN, SDAH (DDJ) is a pain for long distance, even locals struggle to run on time unlike HWH where locals run on time...

Haha bro don't give NTES acquired data, I have been taking 12339 thrice a week since the last fortnight and I have witnessed the delays myself!!!
If you wish I can post a selfie with the train when it arrives tomorrow at HWH :P
Anyway further clarifying that I am not an ER hater, rather I spent more time on SCR tracks than at either ER or DHN (ECR).
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I love Indian Railways as a whole , I rarely have engaged encouraged zonal bashing and barring one division (The great Danapur)and one zone (ECR) which I confess to hate passionately, I love every other aspect of the Indian Railways...
Hapliness is travelling by the railways for it exposes you to multiple faceted diversity of this great nation....Hail Indian Railways...
Goodnight