The old rule was much more simple to understand and easy to process, not to mention allowed ease of filing reports for violations, it used to be if you get blued you're pvp dead in that system for 4 hours, no re-entry and no re-engaging parties that engaged you. The rule is a mess and leaves too many "What if?" scenarios, honestly whoever re-wrote this rule should be smacked across the back of the head.
I mean currently I can just relog on another ship same faction just a different name and could even use the same type of ship, granted I wouldn't be able to engage them but who needs to do that when all I have to do is provoke them into engaging me.
Additionally they may have engaged me say 30 minutes ago and lets say I've logged a new character, I see them grouped with two other people and it look like they're preparing for a brawl, I also notice the navies side preparing for a brawl. This leads to two additional problems, first I could join the navies fleet and engage his friends [but not him] so I would be remaining within the rules by not engaging someone that killed me.
Second lets say they're gathering, suddenly one of them pops up on my scanner and I move to intercept, I catch it, engage it and kill it. I've now indirectly affected the fight, this could also be used as a method to draw them in for some revenge.
It leaves things very messy for reporting re-engage reporting, in a large brawl you'd have to take a screen shot of every ship actively shooting at yours and then be able to remember all their names so that if in an hours time you come across them you'd know they were breaking the rules, nobody wants to put in that much effort for a report, making a report should be easy to discourage rule breakers.