There are many demands and desires of passengers for a route change, extension, frequency increase, fresh trains. In every budget, number of new trains, extensions etc are announced and thereafter implemented. But there remains still more and more rush of passegners and more and more such demands.
Cost wise, I mean fare wise, you have to complement the IR as for II class and sleeper class fares are the most fair and reasonable when compared to Road travel including travel in State Transport buses.