Pak suzuki should have launched swift with K12B, 1200 cc engine in the first place, it would have given many advantages:
1. Its registration and annual token would have been much less as now with M13A it falls in higher bracket.
2. K12b is much more fuel efficient engine and its average is 15-16 Kmpl in city.
3. Above 2 factors would have contributed significantly to the sales of swift and it would have sold atleast 40% more units.
Pak suzuki took engine of liana (M13A)which was available at the time and launched this car with that engine, definitely they would have seen some advantage w.r.t cost of an older engine but it was short sightedness which resulted in significant less sales.
Now they should launch the latest version of swift which is launched worldwide with 1200 cc engine but looking at their record they will again launch one generation older model as they get the old model settings at cheap rates which are being dismantled from other markets.