Planet busting is far too high-tech for I:B. The amount of energy needed for that is insane, although I do have my fantasies about being able to push small asteroids into the atmospheres of planets. However, the asteroids are currently fixed IIRC.
The engine would need terrain deformation for such a thing to be satisfying, though.
The idea of exotic weather isn’t so far fetched. Perhaps a planet could have intense winds unbearable for all small ships or a surface temperature that makes you take heat damage.