30 minutes delayed departure from NDLS would again be not preferred by the authorities. Firstly that would mean overtake of Dakshin @ Palwal or Kosi Kalan & secondly the schedule of most trains running ahead of TN would require alteration since TN can not go on overtaking all trains which comes in its way.
IMHO TN is having a good schedule & should not be changed.

But at the same time, the overtake by YPR Duronto can be avoided.

Just to avoid one overtake change whole schedule is asking too much

Overtake by YPR duronto is a weekly affair and so it will not have much impact on running schedule of TN.
To avoid overtake of TN by Duronto one cannot make TN overtake 10 trains enroute by changing the schedule.

Yes , agree completely

Agreed. I wish this train could run the way it used to run earlier when it was introduced. Anyway, it is still a great train.

I hope IR does not add any halts to this train.

Let TN maintain its glory with the current schedule. No more halts required.