In Powerplay, you support a power and others try to stop you doing what you need to do. Anything someone does is with this context, unlike the wider game where attacking and destruction has no reason behind it.So essentially you're agreeing with "G5 murderboat survived confrontation with a Type-9 ... is to be rewarded"?
Taking what I said above you could design it so that only NPC haul fortifications, and that its abstracted. So, in game you'd have a weighted strength for how fast a system fortifies, and is represented by USS of convoys, or SC ships.No NPC hauls, and also players cannot haul? Who is doing the hauling then? I must be missing something here.. Could you spell it out for non-specialists?
If this was woven into a gameplay system you could have states that speed this up, slow it down or temporarily halt it (like infrastructure failures) all based on what attackers do.