From my perspective, and I could be wrong, all you got with the updates was more Do Not Fly data.Sorry if it seems like a million questions, but what differences do the newer firmwares bring? Flight control, sensitivity, response ect? And will I have full functionality with the app if I don't update?
At the very least you will need to do an IMU and initial compass calibration. Use a laptop with the WiFi turned off so that you won't get a mandatory update when you plug in the Phantom and run Phantom Assistant. I would also run the RC Assistant on the controller.