If you want video AF why are even looking at a DSLR? What's the point of doing video for you?
If you're going for everyday stuff then stop down your lens and set your focus at hyper focal, if you're shooting cinematic shallow dof or whatever then no one uses AF anyways, video will likely be dominantly MF driven for the creative uses of such, and the general unreliability of AF in most video cameras.
With that said, Canon DSLR video has gone absolutely nowhere in comparison to many others, upsetting because it's Canon that started the whole HDLSR trend, so I'll be getting a Panasonic GH3, which has amazing video (and I think good video AF capabilities as well, but I doubt I'll use it). But that will be purely for video, and a backup/second camera for photography. If you came to Canon for video, I did too, and I feel for ya, but go ahead and switch systems, in the end you'll lose out in getting rid of your gear, then maybe even realizing what you switched for wasn't the answer anyways, then you think of switching back... and oh dear... no matter what side, switching should always be a last resort