is any BMD capable of 4 tracks of audio ?

Would be nice if the Broadcast G2 could record 4 tracks... 2 mono mic's lavs, and use the included camera stereo mic for ambience...

Or have I missed something ?

none of a BMD cameras can record 4 tracks

you can only set one channel for internal and one for external

It's a shame since the Ursa Mini/Broadcast has AES inputs which is usually two channels per input.