If it were up to me, push/pull effect computers would be passive in the following manner:
-When active, a push effect causes you to accelerate faster in the direction the computer is facing, and ONLY that direction out of the six possible ones (if you want an increase in two particular opposing directions, either use the Thrust menu adjustment thing or use two opposing effect computers).
-When active, a pull effect causes you to decelerate faster when holding shift or whatever your "hold-to-stop" button is.
It may not be the best solution out there, but it would give them both use in a more meaningful way than they are currently set up (the effect computers alone that is, not when attached to weapons).