In the DJI NAZA software you can change all the different gainsettings, something you would normally do if you change to different propellers, stiffer, smaller, bigger and/or if you would change to 4S batteries as a few have done.
In the software you can also enable MANUAL mode, and perform a recalibration of the paramaeter that makes the Phantom understand what is up/down and level state.
Other than that there is not too much to change in the software.
Strangely enough, nobody has made a hack or tried to improve the NAZA software...........
Remember that the Phantom Naza uses a different sotware than the NAZA-M so make sure to download the correct one,
or you will be in big trouble, have anyone been able to recover the Phantom Naza from using the other software?