Let's clear out some points here.
- No wastage of money with electrification because the Diesel cost is still saved by using Elocos on freight trains which can burn a lot of diesel while idling on a loop line waiting to get overtaken by a train or waiting for clearance.
- NWR does not have their own Eloco shed to allot locos to those trains. Right now ABR staff is getting trained with some WAP4s and hopefully once that is sorted out TKD/GZB/BRC or any other shed will start transferring locos to them....
more...

Fresh allotments will happen but will be limited due to less manufacturing of Passenger ELocos
- High Rise OHE is an issue for delivering a high speed safer ride in a passenger train. They require special loco to be equipped with High Rise panto which is progressing but in a good pace. GZB/BRC/TKD are ready with many HR locos but those are being alloted to their respective zonal trains.
- Delhi Sarai Rohilla has some incomplete electrification that needs to be sorted out which will take time and won't happen instantly. Until it's not sorted Elocos to some trains won't be provided.
- It is not easy to change a trains platform in a pinch. A schedule is made and this is a systematic process where trains timetable needs to be followed and lines needs to be adjusted for a smoother flowing.
- Other zones cannot just allot their locos to a train that is out of their zone. There is a system that checks and balances the mileage of these locos and cost is a factor too. Imagine this scenario where BRC P7 is hauling Udaipur Jaipur Intercity on a daily basis and suddenly it has a cattle run-over. In that case, the damage to the locomotive needs to be covered by WR. But the train the loco was hauling and the zone it was going through was NWR. Cost and management of this will take a long time and WRs budget will be ruined.
- Giving an Eloco to a daily train is a priority then a weekly train. WR would not want their loco to be rested in Bathinda for 48 hours or whatever the schedule presist. Because they need them for other trains too.

Hopefully this makes sense.