A lot of people seem to be thinking of this as a combat based game though, which at it's heart it isn't. If you are going to make these changes, what changes would you put in place for Trading and Exploring? For they are, I would suggest, more important for the majority of players.
Then why is the only rating shown when one scans a ship the combat rating of the pilot.
As for trading and exploring I'm sure a system could be put in place to rate those guys based on more than just how much money they've made or systems they've explored. Or maybe at the top level players get a blended rating that somehow combines all the different professions with a weight based system that starts with the chosen/active profession of the player. The methods that could be used are numerous.
On the other hand - I would disagree that ED isn't combat based. Everything revolves around combat either directly or indirectly. Missions are highly combat oriented - even straight fedex, bring me some gold, missions because in my experience quite often on those mission the rate of interdiction goes up. Too coincidental to be an accident. The increased risk is there for a reason.
Space is a dangerous place whether you're a pirate, bounty hunter, merchant or explorer. Just like in real life someone wants what you've got. Wanna keep it? Then you better be ready to fight.