I think Railway is considering morning Departure from Ahmedabad.
Following options would be more convenient to passengers and Railway
Option 1:
Ahmedabad Departure: 05.55 AM
Mumbai...
more... arrival: 11.25 AM
As per existing Speed of Mumbai Gandhinagar VB
Option 2:
Ahmedabad Departure: 07.45 AM
Mumbai arrival: 13.15
As per existing Speed of Mumbai Gandhinagar VB
Option 3:
Rajkot Departure: 04.30 AM
Ahmedabad arrival: 07.30 AM
Mumbai arrival: 13.15
Mumbai Departure: 14.15
Ahmedabad arrival: 19.45
Rajkot arrival: 23.00