With the interdictor structure, we run into a slight problem. Speed. The people you're trying to catch can very easily fly away and out of range, so sectors will need a size increase to account for this. But this will also make warping more of a mainstream travel system. The problem with that, is the charge time. It takes a retarded amount of time to charge the warp, so, we'll need to either:
A) reduce the charge time significantly
or
B) change how the warp drive works entirely. At the moment, it's just something that teleports you from one place to another, so, why not do something similar to EVE Online, on how it just propels you at ludicrous speeds, well, it moves the space around you. Make it similar to how a real life warp would work. Collisions wouldn't need to matter, as they aren't apart of the space that you're moving, so it'd just be warped around the warp bubble. Charging the warp would also be replaced with having to align yourself properly, and gain some speed. This will allow warp to become much more mainstream, allowing Interdictors to also become a more viable option in the future.