Pick-up wise.. the gearbox not sensitive enough for downshift, but find it a bit lembap!
I faced the same thing too during running-in.
The gear shifts up too fast from 1st gear to 2nd and the engine chokes (like too much air/insufficient fuel) at 2000rpm to 2600rpm on 2nd gear but frees-up after 2800rpm.
Yup, it's lazy when need to kick-down too. Stomped on the throttle during overtaking/slight uphill gradient brings no kick-down action, have to down shift manually. It also struggles to reach 120km/h when I took it for a drive on the ELITE highway from Dengkil-USJ, the flatspot is again at between 2000rpm to 2600rpm.
Dunno whether the engine is too new or what but it is slightly better after the 1st 1000km service (SC tighten up the throttle cable), haven't got a chance to try it out after more running-in becos came to China 3 days after the 1st service 3 weeks ago.
Comparing to my SX4, my SX4 responses very much better although the HP & torque is nearly the same, maybe becos it is well runned-in with 45k km already.
So far the FC is around 10.8km/L with 30% highway but mainly stopping & waiting condition for the balance %.
So far no smell during the 2 weeks running-in.
As I do own a SXi Myvi myself, I will say the Swift is leaps & bounds more comfortable, much quieter & sturdier than the Myvi.