Yeah, Elite's mistake here is not having zones with tougher enemies, just encounters (with pirate activity, hazres etc) that aren't really worth doing for the difficulty/reward. The thargoid controlled systems kinda go in that direction but the threats end up just being an annoyance at this time.Well they have increased the difficulty of high level NPCs a few times, and it's normally met with an outcry. I would also say that the example I gave I don't think is dependant on RPG character levels. It's about game progression.
As every MMO of any kind gets older, progression gets quicker and easier.