Thats fair enough. If your GM allows it, so be it. I never would though. Just like modern aircraft/ships/cars/trucks. I can't hack into the GPS system of a big rig and control the steering. I can't get into the communication frequency of a V-22, and tell it it to go from helicopter flight to airplane flight. Those systems are just not connected. In my game if someone did get into he "radio" comms of TIEs, they could do nothing to the craft, as the comm system is not tied to the thrusters, or blasters. Now some of the brand new modern cars do have the wifi capability. One could hack into that, but still not control the steering, but may be able to control the engine, the radio, the GPS, but nothing that has to have a human input, brakes, steering, acceleration. Cruise control is under debate right now. I can't see military craft having this capability, and in my games TIES definitely do not. They are to cheap to put that stuff in there.
That's fair, it just seems like you're basically relegating the slicer to not be able to do his signature thing in combat based on some need for real-world verisimilitude. I think they put that option in the book just so the brainy people could do something other than shoot the turrets or stand around making repairs as needed.
Isn't the slicing during vehicle combat in the RAW just a few black dice here and there? I am AFB at the moment.
I would think that it would best represent radar jamming, false silhouettes, communication issues and other such items.