All Wong did was quantify the scenes into actual scientific values using low ends to boot. Even without the numbers vaporizing asteroids is something that would hurt the Enterprise badly considering that I never really saw anything impressive in terms of durability in the 2nd film. Also believe it or not ISD's are faster considering they can keep up with their fighters and the Falcon and those have comparable speeds to X wings which we saw be able to travel the distance between Yavin IV and the Death Star in minutes at most and they got faster in combat.