It all depends on tractor beam ability. If it's a utility non damage based atk. I think a title that grants the defender a free tractor beam and allow it to fire its primary as well would suffice. This means the defender retains its superior mobility and increases its defense by restricting its competitors ability to get the defender in its primary arc. However the defender would be just as durable as it is now and still be countered by turrets.Mirrimon has it.
The Defender is supposed to be the BEST starfighter EVER produced.
And it's certainly point-costed in that range. Trick is to find an upgrade that manages to bring it up to par, without being overwhelming for anything else.
Who knows, maybe Tractor Beam could be the thing...
I really like this idea. I can't wait to see how the Tractor Beam works.