It does look pretty good. Better than I would have expected for sure. But at this point in the game, I don't really understand the frustration with the ML workflow and file sizes. Why not just use a program like MLRawViewer to quickly and non-destructively color balance your shots, apply a LUT if desired, and export to ProRes 22 or ProRes LT? Sure, it takes some time to process your files. But at least that way, the massive MLV raw files never even have to touch your hard drive, and you've got a cleaner starting point.
Also, media is getting more affordable. I was surprised to see that KomputerBay 256GB 1066x CF cards have come down another $100 and can now be purchased new for $300.
Unfortunately, there is no hack for the lack of an opposable LCD screen on the 5D. In my opinion, that is the most frustrating thing about the 5D3.