bhai 1AC will be preferred by high class people like who travel in flight. ab hum bade bade rajdhani matlab eg: delhi-mumbai rajdhani agar lenge toh that will leave at 4-5PM in the evening and reaches next day mrg where as people who come for work can prefer a night flight after 8Pm so that he can complete work and reach on time without disturbing next day schedule. In that way many routes dont have night trains which reach early in the morning( im talking about two cities where air travellers are high). So this route has got that advantage as 1 coach will be for VIP's and one for business class. I feel it deserves 2 coaches. ( I also believe that there are few routes where 1AC is successful)