I very much like it that you're taking a stab at factions going after the player more actively, but in it's current iteration it's more of a nuisance than a threat. To be honest I've only had the pirates send fleets after me, but they're usually the size of a third of my fleet, almost the same composition every time, and it often happens that I get 3 of them in a row within 10 seconds from each other. My fleet is a paragon, three destroyers and four frigates plus various cargo and tanker ships, but the pirates only ever send two cruisers, some destroyers and frigates and a few fighter wings, the same every time.
It's now become a chore to deal with those guys, it's not even interesting to watch how the battle plays out on autopilot. It would bring back some feeling of a challenge if the fleets were less frequent, way more diverse and stronger.