Some good points, and not sure if my understanding is correct as only been playing since the 16th.
But, using your examples with the bounty hunter scenario and a 3A and 4A thrusters. The 4A thrusters will weigh more than the 3A thrusters, but will also give more thrust as they can move a greater hull mass, so surely it therefore follows that this extra power will offset their greater weight and improve the ships manoeuvrability and top speed?
Yeah I don't get this either.
Surely a heavier thruster will also give more thrust even on a lighter ship. I don't get this "optimal" stuff. Unless it's a bit like the speed being in the blue range i.e. need to hit the sweetspot. *confused*