Pak suzuki have to obey orders made by headquaters.They Don't change shape but stop production coz ppl have the replace of baleno in the shape of Liana.
Here in japan suzuki introduce Liana(aerio) 3years ago & i did not see 4door sedan version yet on the roads.
jap liana equiped with DOHC 1.5 & 1.8 VVT engines but price is the matter here also coz ppl can buy corola,sunny,lancer or civic in the same price.