I can see why many folks are upset about this, as there surely will be a flood of cruisers hounding the lanes the next few days...but:
The problem is solved as easily as it always was: you need one single snub to fly ahead of you or your convoy to ring the bells if the lane is disrupted. that is all...one little ship, it can even be a restart CSV. That is all you need to evade 90% of all the pirates around.
=> if i see Praefects hogging "my " lane and i come by in my puny pirating Titan...i will scream "what a waste of the empires time and ressources, get back to the real battlefield!"