I think the Efficient Dynamics push will work against brake ducts. Apparently BMW is big on managing aero drag in the wheel wells which explains the functions of the side ducts in the 1M bumper. I do believe the F30 has something similar. I don't think fixed piston calipers will make the brakes bulletproof.
But only time will tell.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red