The only problem with that is that keeping Coruscant safe is probably an Empire win/lose condition. The Empire lost Corusant in EU and the rebels fled from Yavin 4 and Hoth so i think you can get a chance to retake them. Can't exactly retake Coruscant if it is blown up. The asteroids will be there, but it will be a resources only point, no population. I ment if Courusant got captured.