Scrap Persistant RES site altogether,Only find pirates in super cruise in USS or trying to interdict you,RES site should be non persistant,They should occur at a rate dictated by the circumstance in the system,An alert would appear on the station buletin board ,You fly to the location eliminate a number pirates generated by the RES spawn,then it dissapears,
I actually like this idea.
I'm not a big fan of "Res Farming" as it detracts from the essence of the game and invokes the use of the word "grind", even if it is one of the more fun ways to do it. It's a bit too "anti-experience" too much and more "Fast Rank".
If they were to exist they would need to be very heavily controlled as you'd expect a system to do if it's the main export from that system. Basically, more viable for Miners than for Bounty Hunters and a place that pirates would fear to tread so there shouldn't be that many in a Res site, unless a Low security system but these should be limited.
A smart Pirate would hang around on the periphery outside the Zone, waiting for Miners to leave with the good stuff and then interdict.
Bounty hunters should be watching for lurking Pirates.
Maybe Mining should be done in Belt Clusters as well. A bit more risky because no security but maybe a higher chance of better ore.
While I'm at it, how about some Frontier Mining efforts in Unknown Space looking for new materials, this could led to something similar as the Gold Rush in US Cowboy times.
So much could be done with that regards Galnet and could even lead to new things that could be outfitted to your ship. More unknown quantities as well.
Just thoughts.