I'm quite sure they are fine tuning it, and will continue for the life of the game, and that includes adding more challenges, more challenging missions and so on. I was surprised, and not at all unhappy to have been interdicted so often today, it livens the game up, and I can run if I need to. Perhaps they are in at the weekend, tinkering. I agree entirely that less secure systems should be more dangerous, and if danger is what you want, you go there. They have enough systems to do that with, and I'm pretty sure it will come. The game is easily big enough to accommodate those who want a safe easy life, and those who are looking for an adrenaline rush, although I'm sure there are better places to get adrenaline rushes than in front of a computer!
I think there's a big difference to content, which can be easily tuned and added to or removed from areas, and mechanics. Mechanics by their nature need to be more or less constant across the game world or it gets weird and very confusing. Sometimes you can tinker with it, so say station run ins could be kept at 8k inhigh security systems but extended in low security.. with the run in for an anarchy being a real risk for slow ships. Other things like the 'killing shot' mechanic and supercruise have to be consistent and obviously some matter more than others. Take SC.. a lot of the new players (and some of the old) moaning about how long it takes have never done interdictions. They don't know how it works from the hunter's perspective and thus do not understand that reducing SC times would seriously gimp a pirate or bounty hunter's ability to identify and interdict targets.
As Tar Stone rightly points out a lot of this stuff has been debated for months in the beta forum and folks get tired of laying it all out, especially to new players who have not taken the time to get to know the game and actually think about it before whining. That's when folks get annoyed and where my comment about new players 'not having the right' to moan came from. Nobody is saying that new guys can't suggest or question things, but have some self respect and don't leap in with hyperbolic rants which amount to 'no fair'.
*sigh* minor rant over