I don't think you're right. I had been at the NDLS station twice when the 12045 left in the evening. They were full as I noticed the charts. I had travelled by 12011 thru CDG and there were so many who got down and got into the 12011 at CDG. How do you know that 100-200 seats go vacant in 12031? I checked the reservations of Exct Class and they are full for atl east till 10 Nov. That is the reason.