What thesizzler said. If you can't fit a hyperdrive to it, you're not building a large enough missile. And we're pretty certain my terminal-c missile is not a long-range weapon, it's for knife fight range. And yes, lasers cannot be intercepted, but it takes a lot of them to be an effective anti-ship armament. A few terminal-c missiles of decent size would carry a lot more hitting power than the laser banks of most star destroyers.
Also... given the prevalence of black hole-based systems in SW, is it possible to make a weapon that simply causes a singularity near its target, damaging and/or shattering the hull?
Or better yet, combine the two, so you have a black hole traveling at relativistic speeds. Energy requirements are gonna be a *****, but this is SW, since when has that made any difference?