I know it has been basically ruled out to be able to jump from any gravity well to any other, but how about making that possible, but making the time/distance relationship exponential such that it would be the same length of time to take three small jumps from a->b->c->d as it would to take one large jump to d. And if you’re ripping a big hole out of space-time, maybe the people on the other end would know as soon as you initiated. That way, you would have more time to prepare for visitors from farther away, but the fact that we are playing a game in SPACE with jumps through HYPERSPACE would be a little bit better integrated with the more traditional space-time continuum.