A sensible police force scales their response based on the danger of the attacker and the seriousness of the crime.
A beginner pirate that manages to avoid killing should have time to scoop the cargo. If he kills, he gets less time but can still get out with less loot. He would still have to move to a different system to avoid flak, if the attack wasn't in an anarchy or low sec system.
The point is that for a beginner pirate, it basically works this way already. For a wing of wanted über shielded Corvettes, no appropriate response exists.
The system already does that in a limited fashion:
Continued bounty increase and more infractions in a system lead to faster responses
and to the police sending in directly a wing of 3 instead of 1 lone viper MKIII (tested low sec).
With FD now revoking the needed shield changes there is even less
of a police response existant, due to crazy shields.
But you see, this is where i tie in my second request:
Remove the defense modules.
Without them a large ship is not safe from a wing of 3 vipers either,
he will either rout, or take damage.
If FD would make a mechanic regarding the "outfitting" and "defense strength"
of your ship, you should prepare for salt incoming on the forums, as that c&p change swings both ways,
and inexperienced players will face an according police response, too.
I am talking PvE BH in this case who stray-shots a clean ship.
You see where tweaking that screw leads?