The current Ground Station setup doesn't interface with the iOSD or FPV system, and the Bluetooth module is just used for connecting an iPad to the ground end (or connecting an iPhone to the Phantom to change NAZA settings). Although there might be some integration with FPS when the firmware update comes out for the P2, I'd be very surprised if they started transmitting video over Bluetooth.
Its a little heavy but you are fine. I have a garmin gps, ground station, mini iosd, zenmuse, and immersionrc fpv on mine. I get 17 minutes to a 25% full battery in GPS mode.