I have the opinion that the C&P should complement Powerplay actually.
In the real world, you have the Federal Law (country-wide). Then there's State Law (for your state). No matter your affiliation to whichever corporations (powerplay faction), shooting at people is against the law (state and federal). I tend to think of PP in simplistic terms like "Gang A, loyal to Boss A, Gang B loyal to Boss B".
So even if there's a full-on "Gang War" going on outside your house, it's still against State and/or Federal Law.
So applying it to ED, no matter who you pledged to, shooting at and killing members of opposing faction might be rewarded by your faction, but it *IS* illegal in Federal/Imperial law. You're just being rewarded by Boss A for doing a good job wiping out Boss B's guys. So, the Pilot's Federation bounty should apply, IMHO.
The interesting bit is that C&P should make system security levels MEAN SOMETHING. One should be safe in a Democracy/Corporate State. If people take pot-shots at you, the cops should respond with overwhelming force. Yes, even if Gang A is shooting at Gang B ("take it elsewhere!"), fully sanctioned by their respective gangs. In Medium security systems, maybe the overwhelming force isn't that overwhelming.. maybe cops are short-staffed, or maybe they can be bribed to look the other way. In low-sec systems (feudal systems?), well the cops prefer to be living cowards than dead enforcers.
How is this "complementing" anything? Well now you have to think a bit more right? Like where to do your PP stuff? Or if you insist on doing them in high-sec systems, make sure you're fitted correctly to at least survive the overwhelming force. Or hop in a sidey to do the PP stuff in a High-Sec system