It should be restarted but timings should be different from current Rajdhani Group.
Early morning arrival (4:30 AM to 5:30 AM) at New Delhi would work as it'd enable passengers to board Shatabdi/Vande Bharat Trains to continue further Journey towards different cities.
It'd indirectly resolve Premium Connection demand from a few Cities. Early Afternoon Departure should be there so that direct connection with less waiting time could be established with Amritsar Shatabdi/Kalka Shatabdi/Dehradun Jan Shatabdi for connection to Mumbai.
Clearly...
more... the demand is there.
People had questioned the need of Mumbai CSMT Nizamuddin Rajdhani when it was about to be introduced, now it's running daily.