I think the extreme rake standardization of each and every train was a bad idea as of now. Instead they should have gone for keeping 5 to 7 SL coaches with 3 GS and 9 to 11 AC coaches type rake standardization in long distance trains initially.
Also now in some trains where AC travel demand exists they have reduced AC coaches which is also a bad idea eg. Goa express it will have only one 3AC and two 3E from June it's a terrible coach composition in my opinion.