Yea I'd definatly go with using the bots to fire the cables. All you need to do is fly round the AT-AT legs and the bot will fire the cable automaticaly when needed. Works a treat, and stops them being used as cannon fodder anyway.
Also, having sat in the cable position last night anyway it's kind of boring as there's not much else you can do. I'd rather let a bot do that job than be sat in there myself.
The only fun bit was chatting to the pilot while we were doing it (Xbox). But then the voice chat significantly enhances the game anyway ... if you can find anyone that talks and uses teamwork that is