Thanks for the Input Dave!
Added dip switches and changed a few things around...
Now possible for both I2C and SPI communication.
I'm basically splitting whole schematic into sections so it doesn't clutter up and cuts down re-drawing the whole schematic by only drawing out half and then mirroring the second device from the first sheet.
This way each sheet is represented as a module in the main wiring diagram as shown above.
I2S data and clocks lines will use UFL connectors and cables on all inputs and outputs as the DIYAudio community likes these for its low profile, price point and performance also they are going to routed to another board which will re-encoded to SPDIF ( Coax, Toslink and AES/EBU )
The power supply will be modular and fully regulated ( followed by a CLCRC section ) and separate 3.3V and 5V supplies are going to be available for each "processor". Only on board regulators are going to be for 1.8V and 2.5V and those are to AD's specs.