My support:
Tractors = X amt of power (length) control per beam weapon, compound to lock larger vessels (as is)
Tractor Lock = UCR 1 for any unit locked (as is)
Can Tractor Lock any Active opposing unit with UCR diff of 1 max*
Can Tractor Lock any friendly or any disabled unit
Dmg between Tractoree and Tractorer is 100% both ways
*Prevents Active Enemy fighters from being tractor captured instead of attacked. As I'm reading the standing rules, it seems like the door is left open to tractor capturing active opposing fighters. It says if you have complete tractor control you may physically control a unit, move up to 1 space, drag in to HS etc. This would all seem to insinuate the ability to draw in to Hangar Bays in the case of fighters (provided you've got room to store them)? Sounds crappy for game play if that's possible imo. Granted I haven't seen it happen, so maybe it's not possible and I'm just not seeing where it's noted yet.
This retains some of the Aggressive use for Tractors to satisfy Dem's opposition, incorporates some light concepts of physics and dynamics of large/small hi/lo mass and thrust of vessels, and also closes some open doors for potential abuse.