EOS T6i and T7i as film making tools

I have some questions about these cameras from the film making perspective.

I thought I should start a new thread to gather information for film makers like me.

One question relates to focusing and the other to bitrates.

1 - The speed of the focusing in live view and during video recording.

Does anyone have practical experience with the new rebels?

What most interests me is touch-screen rack focusing, or "focus pulling" as it would be called if focusing were manual.

I am a documentary film maker so I am interested to know if the Hybrid CMOS III system of these latest rebel cameras is as quick at touch screen rack focusing and at tracking moving objects as the Dual Pixel system of the 70d?

Apart form scripted projects, I often film unpredictable live demos and live events and it would help me enormously to be able to simply touch the screen where I wanted the camera to refocus and then have it refocus very quickly. I know this works well in the 70d but I prefer the specs of the T7i so I am keen to find out just how quick this Hybrid CMOS III is.

Is there a one-button feature on these rebels that allow you to refocus during a video recording, I mean apart from using the touch screen?

And what about the cameras ability to track moving objects, a task which the 70d performs well?

2 - Raising bitrate

I wonder if you can raise the bitrate at which the camera records its compressed footage? In the T2i for example you can use Magic Lantern to raise the bitrate up to 3x. This works if audio recording is turned off and the card has sufficient speed. But in the end the camera will not transfer to ANY SD card at a rate higher than 45 MBp/s so there is a bitrate threshold.

I suppose these newer rebels can utilize the latest SD cards and handle higher transfer speeds so you should be able to output video at a very high bitrate (if the hack or native-camera setting exists to raise the bitrate) maybe something that even approaches uncompressed footage?

I have to say that at this stage I have no interest in getting into a discussion about the relative merits of different cameras, I am just interested in getting the information on these 2 cameras. Of course you may wish to recommend other cameras yourself but I personally will not enter into those kind of discussions.