As a 5d iii user and big fan of 5d ML raw, i always wondered how raw on 5d is considered as a "real" option for this camera and not a luxury (time consuming, unriable, extreme cost per Gb of footage etc). It seems that you need these cameras for real jobs so i would stay away from a camera which has two modes: A) crappy & softy low cost HD (personal opinion as an owner...don't shoot me...), B) spectacular & CC friendly raw with a serious price tag. For me, a tool has to give a constant result every time i use it, because you never know what kind of challenge you will face in the near future. Lets say you have a 2-cam/100 min event coverage next week....hmmmm....mode A...damn, what if you desperately need mode B? You have seen it, you liked it but you can't have it this time because it's not a video clip.
Also, you may have become used to the workflow but you will never look back once you have used a proper codec from a serious video camera.
Also If you keep your 5d and purchase an A7s ii you will have to face a painful workflow on the one hand and a CC odyssey on the other to match these cameras in post. So, i would pay the difference for a 1dc...