Do you need a new camera right now? Do you need the new features right now? If not wait and see what the 7D2 actually will cost and offer and then make an informed decision.
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The focus ring could be loose maybe so it might need repaired.
BTW, does the distance scale on the lens move once you start turning the focus ring?
You understand that the camera doesn't have autofocus while recording, right?
A simple way to remotely start/stop is to reassign the shutter release to start stop video (you can do this in the menu) then use a timelapse remote or other shutter trigger to start stop.