Deere has had the C&C package with the control lever mounted button for quite a long time now, and I have never heard anyone here or anywhere else complain about the wiring breaking. I'm not saying it can't happen, but it would be rare or we'd be hearing a lot more about it.
I ran a Z960 with the C&C package last fall for a couple weeks, and the electric deck lift was nice to have. Quick up, and when you let off the button, it went right back down on its own. I can't see why Gravely couldn't do something very similar. Surely Deere doesn't have a lock on that patent and any others that would be similar in design...........or do they?