As it is right now any ship can escape from NPC interdiction. Enjoy that while you can - it might not be so easy after they nerf the Boost + FA off = <top speed forever> mechanic. I suspect people will begin traveling with 4 pips to engines
Now that I see as a problem. If because people are using a perfectly set up and legal mechanic like boost+FA off then they are using ships mechanics to escape trouble.
So as in the WoW universe the crowd, usually in PVP areas, shout oh noes, the hunter, warrior, rogue, mage, etc.,Over Powered...nerf...nerf...nerf. Enough shouting and Blizzard does the nerf. They call it balancing.
Well now we look at ED and find the PVP crowd are doing the same. Complaining bitterly they cannot catch the Juicy trader who has learned a skill to elude them so they want nerf...nerf...nerf. Looking at recent Dev posts it seems they are going to get their wish.
So perhaps traders will start, as you say putting 4 pips to engines, how long before the same crowd start shouting that traders should not be allowed to put 4 pips to engines to attempt to successfully outrun the pirates. Nerf...nerf...nerf.
Then of course lets take away the Anacondas weaponry and let them have just 1 class 1 weapon slot. After all its only a freighter. Nerf..Nerf..Nerf.
Now the game would remind me of Eve where haulers, miners are not allowed any effective guns for defence making them pretty helpless targets for any PK griefer who wants to up their epeen kill board stats.
I really hope the Devs do not start seeing traders as easy fodder for the pirates and or griefers and also forget the idea of balancing the FA+Boost by changing it, after all hasn't the pirate enough skill to use their FA+boost off, gentle control to engage their guns onto the hapless trader running away.
All I can see the nerf doing is driving trader, haulers into private groups.