Not sure why the number of EXPs would possibly increase on Thursday. No one is waiting in the wings to become exec plat next week. I would say it is far more likely that more people lose EXP on 3/1 than cross the 100K mark and gain it.
As for the theory on cancelling DEL, I am skeptical. AA easily could easily combat this "problem" you mention if they cared to do so without exiting India.