HC, the "Do Not Operate" buttons on the AFCS control panel are relative to the SAR modes that have not yet been certificated.
The 189 flies very nicely, there have been several changes with respect to the 139.
Gone are the vibrations through TL due to a different rotor blade design, and the CatA profiles are much more "passenger benign".
The avionics incorporate all what the pilots always wanted to have in the 139.
Fuel burn is actually comparable to the smaller 139 as well.