One of the issues I have with the baddies that interdict you (pirates, bounty hunters etc) is that they are tailored (mostly) to your combat rank. I'm Combat Elite & only ever get interdicted by Elite NPCs (caveat: I have been exploring since before Christmas), and I guess you never get interdicted by Elites. You might enjoy a higher ranked opponent for the challenge without farming (as I did when ranking up), whereas I have mostly lost interest in combat & would prefer a little variety.
For the stuff that does come to the player, I'm not convinced the player's combat rank is a useful KPI, or at least not that alone.
I wonder if a 'rolling last 50 NPC kills' average rank could be used to better represent the players desire for stronger (or weaker) opponents. Use the Karma system to track their recent behaviour & model around that.
You can actually change that for me to "I never get interdicted unless I want to be". That's a whole other kettle of fish.
And yeah, the combat ranking is soooooo skewed it makes a poor marker for gauging true combat prowess to make an interesting event for any given pilot skill. What about players who are 2000+ hours on the stick, who then re-roll their CMDR? That's gotta be a really soft re-start for them going up against a wet piece of cake till they re-top their ranking.
I'm up for any type of more dynamically-reading combat evaluation on the part of the game, to throw more believable and useful encounters at the right players.