Atlas doesnt feel like a pirate ship to me and more like a free world ship, why? Simple
It doesn't fit the low sensor profile, high speed of pirate raider fleet need and usually go for. Most of pirate ship have burndrive(eradicator P) mobility booster(eagle P, mule P) or phase tech(gremlinP)but they are brittle and have lower OP and maintenance than the "best" same size ships becaus eof D-mod.
The promethean MK2 in comparison totaly fit the Ludic path concept, its fast, dangerous and crap hazardly keep duck taped in a single piece of a ship.and luddic path dotn try to hide themself
But for neutral world league? Its a super cheap capital both in price and DP that allow super long range in a pretty static fleet, perfect for planetary defences or sieges as it allow to help or attack space station more easily. And also its an easy to get this Hull in lore!
Personally i think civilian hull is a bit of a problem in game it doesn't serve much purpose since usually civi ship are bad in combat so most of the time except if you make a trading/fuel fleet they serve no purpose that another mili ship wont do better. They are already undergunned OP starved and have often inferior stats to military ships, they dont need ot also have poor profile and sensor range.