I do think its kind of funny that the one thing the tractor beam really can't do is slow down a ship you're pursuing; which seems like it should be the whole point.
A reverse boost would of been thematic but perhaps hard to balance. But even then you can slow down a ship you're chasing, by half a base worth. Not a huge amount I agree but you can pull them backwards a little bit.
It's absolutely a balance decision, IMO. Makes it harder to use it to get Range 1 shots, provides a lot of rule protection by reusing two existing rules, and isn't as abuseable as it would be if you started stacking it with Ion tokens. I just think its funny that the only thing the tractor beam doesn't really do is pull a ship towards you is all.