"Ring 2 Jumpdrive"
Do away with the phrase "Transspace Jumpdrive" and incorporate a "Ring System". A "Ring 1 Jumpdrive" takes you to the original Eridani-Heretic ring of gates, but to hit "Ring 2" you'd need a "Ring 2" drive.
This will allow players to keep their jumpdrives without their being able to jump to wherever they want in the new systems within the first 30 seconds of game play.
"The Badlands"
This would go for several systems after you pass the Iocrym where there's nothing, no support, as the humans were in quarantine in some deserted corner of the galaxy and once you pass the Iocrym blockade you'd better have a solar collector or two ...
After you've gone several systems in you start seeing a few sparse signs of life, an ice farm here or a mining operation there, a few scattered pirate bases. You wouldn't really be on the "frontier", more like the boondocks. As an escapee from a prison system you'd expect to find yourself emerging into something like a worthless dump.
The purpose of "The Badlands" would be to reinforce the eerie sense that you are in a place you don't belong and where no human has been for centuries and possibly drive home the malevolence of the Iocrym in isolating humans so far from the rest of civilization.
"Human? What's That, Some Kind of Fertilizer?"
Depending on how long humans were isolated, many aliens might not even know you were an escapee until the Iocrym got the word out, as they wouldn't have even heard of humans, or hearing centuries of nightmare stories of ferocious, bestial humans wouldn't recognize you as one. ("You're human? No way! Where are your poison claws and 10-inch fangs?")
The Iocrym themselves might not even give 2 cents about escaped humans, as they might've forgotten they even quarantined you in the first place, their automated blockading battleship just something left in place and eventually forgotten.
"You're a what from where? Oh, we did? Hmm, well, your tough luck I guess, but I've never heard of a 'human quarantine', so as far as I'm concerned the past is the past."
At some point the Iocrym bureaucracy could catch up with what's happened and all the Iocrym go hostile on you.
"War Zone"
You emerge from Heretic into chaos and carnage, as Iocrym battleships exchange disintegration pods and thermonuclear salvos with some generic "greater threat" we'll call the "Brain-Eating Reavers".
You'd better have saved a couple of kitten pods.