I recently switched to an FX3 (from shooting redcode on a RED Komodo) and found the workflow for ProRes RAW to be horrendous.
I've helped build an Adobe Premiere plugin which is an entire RAW processing pipeline with proper RAW controls.
OCTOPUS RAW Studio
You can finally set white balance and ISO and a lot more!
It also supports CinemaDNG.
If the sensor is this one:
https://www.ximea.com/en/products-news/pci-express-camera-cmv50000
Then the claim of 15stops of dynamic range would be quite incorrect. On the Ximea website it lists that model's dynamic range as 64 dB which would be closer to about 11 stops.