I agree that the rake length should be increased. Just pointing out some issues here.
The platform length increase was not implemented rigorously. Many of the major stations have long platforms, but the platform length has not been standardized across all stations. So you may have some stations on the route having long platforms, while most of the medium/small stations don't. This won't be a problem if it's only a few trains having longer rakes, but it will be a problem if longer rakes become the norm.
Moreover, just having a long platform...
more...

doesn't mean much. The signalling, fouling points etc also have to be moved so that the full platform can be used.
For example, one of the platforms at Secunderabad (SC), I believe it is PF3 or PF4, is long enough to hold 24 coach rakes. But the points (where the track merges with the other tracks) are too close to one end of the platform. So, some space at the end of the platform is useless, as there is a safety margin to be followed here. Because of this, the platform can only hold shorter rakes, despite being long enough. ( I don't know if this has been rectified now)
Similar issues may be present at most stations that seemingly have long platforms. This restricts the number of platforms that can be used for such long rakes, making things difficult for the controllers.
Again, not an unsolvable problem, but not a simple one to fix either, as it will require yard modifications at many places.

One more issue that rarely gets mentioned, is the capacity of the EOGs and the HOG. Adding more coaches adds more electrical load on these systems. They may develop unwanted harmonics (secondary characteristics in the power supply) because of the increase in the rake length.
This would be an even larger problem to handle as all the EOGs and the HOG systems in locomotives would have to be upgraded to the new specifications.
This is potentially an issue in this case as, particularly in IR, we have a tendency to always...
more...

implement systems that 'just' meet' the needs. We usually leave very small margins for updates and expansions.
Most stations have platforms and loop lines that are 'just' long enough for the longest rakes of that time. The locomotives are typically just powerful enough to handle the largest loads of that time.
It is such philosophy that is the main hurdle in transitioning smoothly to newer technologies, and optimizing operations (in this case, increasing the LHB rake length).

Yes, I know these problems. Which is why I mentioned attaching a couple of coaches in the busy season, not as a permanent basis till such lacunae are rectified.
Power may not be much of an issue for mixed rakes as only one EOG is used. It may pose some problem with full AC rake with pantry. Presently, P7 power capacity is being ramped up by 500 HP. It may be in line with providing more power with HOG. With 100% track electrification in sight, next couple of years might see most trains with electric power end-to-end.
Home...
more...

platforms at major stations do have required length from where most popular and prestigious trains operate. What I suggested was attaching couple of extra coaches to such trains only in busy seasons when wait list turns into regret.

Its not flop train. Dont go by news items
22415 VSKP NDLS APEXP 10-05-2017 VISAKHAPATNAM NEW DELHI GENERAL

S.No. Date (DD-MM-YYYY) Class - 3A Class -2A
1 10- 5-2017 GNWL119/WL68 GNWL38/WL24
2 11-...
more...

5-2017 GNWL122/WL81 GNWL44/WL10
3 12- 5-2017 GNWL147/WL73 GNWL38/WL16
4 13- 5-2017 GNWL157/WL86 GNWL45/WL28
5 14- 5-2017 GNWL110/WL57 GNWL29/WL19
6 15- 5-2017 GNWL94/WL51 GNWL16/WL8

22415 VSKP NDLS APEXP 16-5-2017 VISAKHAPATNAM NEW DELHI GENERAL


S.No. Date (DD-MM-YYYY) Class - 3A Class -2A
1 16- 5-2017 GNWL83/WL42 RAC27/RAC 22
2 17-...
more...

5-2017 GNWL56/WL44 AVAILABLE 14
3 18- 5-2017 GNWL68/WL48 RAC6/RAC 6
4 19- 5-2017 GNWL60/WL49 RAC5/RAC 5
5 20- 5-2017 GNWL120/WL58 GNWL20/WL4
6 21- 5-2017 GNWL52/WL29 RAC23/RAC 22

3A full till next month start
22415 VSKP NDLS APEXP 22-5-2017 VISAKHAPATNAM NEW DELHI GENERAL


S.No. Date (DD-MM-YYYY) Class - 3A Class -2A
1 22-...
more...

5-2017 GNWL35/WL23 RAC6/RAC 6
2 23- 5-2017 GNWL21/WL15 AVAILABLE 84
3 24- 5-2017 GNWL18/WL6 AVAILABLE 91
4 25- 5-2017 RAC41/RAC 34 AVAILABLE 109
5 26- 5-2017 GNWL53/WL19 AVAILABLE 95
6 27- 5-2017 GNWL65/WL31 AVAILABLE 46

Ippudu season andi....AC trains ki preference untadi...
But,in off season if the same status is found then we can say that this train is successful...
Being a state express,it is supposed to be faster than what it is currently and that is something the public finds inconvenient ...
Tamilnadu,Kerala SF pakkana pettandi....Grand trunk kanna 1 hour ekuva time with almost 20 halts less than...
more...

GT is something that shocks me about this train..