Remember at this time there are no pads for steel rotors available in CCB caliper/pad sizes and to be honest I can’t see any demand for a vendor to create a set, whereas for the steel caliper there are now 6+ options including EBC, Hawk x2, OEM/Brembo and Ferodo x 2 with another half a dozen options in the pipeline for 2018 from vendors such as PFC, Brembo and Ferodo.
To be perfectly honest the idea track set up for this car is a two piece 380mmx32mm Front steel slotted rotor from Brembo/PFC with a decent enduro pad such as Ferodo DS1.11 (on their way I believe) or RT RE10. Most essential will be some additional cooling ducts such as those Al is investigating - the biggest contributor to the massive wear rates on the steel set up on the track currently is due to thermal stress...
If using CCB extensively on the track my preference would be to revert to a 5 stud kit rather than use the factory bolts. This will allow the wheel to be more easily removed without the risk of chipping the rotor edge. This is a real risk as previously noted, just look on eBay and you will see a vendor already selling a edge chipped QV CCB rotor!!
2017 Alfa Giulia QV (DD), 2016 Cayman GT4 (track hack), 2017 Ford Focus RS (for sale), 2017 Macan S petrol (wife hauler).