My problem with this change is not so much mechanics, it's going to be a fun change for once, but this:
How can one justify employing a cruiser/battleship to pirate single traders, if a cap is used to hunt down actual convoys, that's all fine and dandy, but what in the Christ is your reason for using a cruiser/battleship (of which, mind you, unlawful factions have, what, like, 3-5 cruisers + 1-2 battleships?) to park at the lane and pirate unaffiliated traders?
TL;DR: Will there be some RP restrictions applied to being able to pirate in cruisers/battleships, if suddenly,there will be a cruiser/battleship parked every other system?
Also, I agree with what many posted here: If a trader has docked (escaped), he should be exempted from 4-hour banning rule, even if in reality, the one you escaped from would be waiting on the other side as soon as you undock, in case you undock one, two minutes after docking.