DWS is Drive by Wire System.

Basically instead of using a throttle cable to adjust the throttle plate.
It uses a electric signal that goes to the Electronic Control Unit(ECU) which then sends a signal to the throttle plate which is controlled by a motor which takes time to open and close on standard cars due to the motor being used(these are used for economy) and the throttle map used by the ECU which are again mainly designed for economy.

If you are going to get new wheels try to get the ones that are the most light.

The less weight on the wheels, the better the handling will be.
Which can make a car feel nicer or sluggish.

Replacing the ECU with a performance one or remapping it is one way to reduce the lag.