All the LCCs are doing this. Another why allow your pax to be comfortable when you can pack them up like sardines for cheap. Bet they will cut down on the toilets on this flight just like they’ve done on the DEL-IST route to make room for the lie flats and some more wafer thin Y seats. DEL-STN... as long as you don’t need to pee.
Also this is another aircraft category where Boeing doesn’t have an answer as yet and Airbus seems to be killing it with the LCCs all over.