The dpf shouldn't cause you any problems as long as you take it for a good drive or thrash it every now and again, I don't do mega miles and it hasn't caused me any problems.
The turbo lag is just something I have had to get used to, I think I actually like it when I can feel the turbo kicking in, if that's the right word! Haha
Not sure about any ecu re calibration so can't help with that I'm afraid.
Enjoy the car!