I've had similar ideas, Tho i think should be Alioth and moons safe zone, then 6 planets. And only 1 far like 2hr thats an ice planet. 3-4 planets within 30min to 1hr. That way u can do away with warp. Then you can also upgrade the radar system and use taht for future content., like finding NPC wrecks to salvage, anomolies.
Ive also thought as others have said have 1 gas giant. with HUGE gravity if u get too close, that pulls you at 10g or even more as u get close. And have like 14 moons around them with some high value ore. Great place for pvp, and exploration and some danger.