Yeah dual iso is a PITA really.
Mlvfs code was not intended for 10-12bit RAW processing. I changed this and it now supports, "kinda", this RAW modes, but there was a lot of nuances with white and black level calculations/conversions and I have to say that aside of 14bit it is not reliable at all.
Also it is "super quick" as turtle

, because of complicated loops which can not be correctly multithreaded with openmp.
Adapting cr2hdr to mlvapp is also hard because @dmilligan did a great job to optimize and sometimes cut corners for speed's sake and those code parts are very different.