BMPCC4K is a perfect form factor (cheap media? and batteries). On the plus side it has DCI 4K 60fps raw, will see what .braw brings in that camera. .braw put their 4.6K Pro at least a few steps higher than with old cDNG, you can playback footage with no frame drops, with heavy grade etc. on a +1K€ 3 year old PC laptop. Files are smaller (longer recordings, less disk space) and easy to transfer. And from what I could test, I can belive them that .braw put one extra stop of DR in the shadows. CDNG with its separate frames=files is the bottleneck of post performance... On the downside it is a small sensor camera (usable with speedbooster?), not exactly rainproof, etc.. Has its early? quirks as I have seen on some video reviews.
If A1ex gets enough help and pull ML on 5DIV, that would be the camera to go for what our team needs. 13.6 stops of dynamic range and good low light performance and 2.2K raw from 1080p (if I understood correctly?); that is almost like having an old Alexa with 1 less DR and much better lowlight performance, perfect for 2K DCI deliver.
But you can't have it all, for now what ML enabled on 5DIII is just plain awesome and for our workflow, raw is just a no brainer over all other 10bit 4K enabled plastic-ish image looking mirrorles wonders of the world. I agree about dynamic range. Roughly 11 stops can be a little short, but if you know what are the limits and how to pull that extra bit when pushing cDNGs, then you can get quite good results regarding DR I think.
I can agree with what was written about handling raw in post. But lets not forget, that on the other hand, a 40K$ option medium format from Hasselblad has 4K raw, that you have to convert first to get cDNG, just like with our ML enabled little and cheap, yet raw capable cameras (thanks to ML devs).
If there was a way to convert MLV to some other form of raw than cDNGs, that would put ML Canons into a different ballpark, on an extent even higher than for example Kinefinity or some other smaller exotic companies that are forced to use cDNG (but if there was a way, they would use it already).