I'm not sure I see the need for this type of package.
If it was a axiom air type set up (battery powered) with a pair of M5's maybe...I could get excited about that.
If its for around home I would likely use 2 channels from an existing avr or purchase a dedicated avr and run with it.
Bluetooth would be an obvious downside, having control over wifi would be a plus but I think you have that covered already.
It did get me thinking about outdoor subwoofers and outdoor in wall M5's.
I need to start purchasing lottery tickets again.