As far as the 13 stop of dynamic range remember that that 13 stops comes from the 12 bit RAW, the Blackmagic RAW. Any company can sell 15 stops of dynamic range then bury that last three or four stops down in the shadows where you can't see it anyway. So when Blackmagic saws 13 stops, they mean 13 stops that you can actually see with the naked eye.
Instead most companies say "15 stops," "15 stop of dynamic range!!!!!1!!!1!!!." You naturally think oh, I get it 15 stops really means 11 or 12 stopsof practical range. Na, it's 13 stops of plan jane range that you can actually use in the film.
Given that BRAW can be shot in different bit rates like 12:1, 8:1, 5:1, 3:1 is very impressive. So when shooting 12-bit raw, that 13 steps of dynamic range is totally usable real estate from what I understand.