This situation existed before 2014 too, but the scale is very less. After the rake standardization it has gone worse.
Better to run seperate AC and sleeper trains, so that unnecessary pax won't enter. But it's highly doubtful that this govt will run seperate sleeper trains, that's why eliminating all non ac coaches.
If they will decide to run seperate sleeper trains, then all pax will shift there and AC trains will be in loss.