Why does the BMCC6K still lack Pyxis's 16:9 crops?

Both cameras use the same sensor but Pyxis 6K has additional 6K and 4K 16:9 crops. Obviously, it would be ideal if Ursa style crop selection and image circle-based crops were added for both cameras but I figured the BMCC6K would at least be brought to parity with the Pyxis because I thought BMD said they're supposed to share all the same shooting modes.
The two cameras even share the same entry in the Blackmagic Camera Readout Speeds thread but those two crops aren't even mentioned.
The two cameras even share the same entry in the Blackmagic Camera Readout Speeds thread but those two crops aren't even mentioned.