The biggest issue with Sep' factions is that they're just made for a quick event. The only two admins who made proper sep' factions was Grimm with D99, which was just a Sub-Faction of a Faction. And then Bospy's Red Faction. Sure, they may be a little weird to some, but they felt like they had a genuine motive behind their fighting. They both had some morals and beliefs, as well as a fighting style.
The admins just need to be creative with their events and just stop running them with little to no thought put behind it. But I'm not saying they shouldn't just stop mindless events, as then we would be waiting like 7 hours for an event. But a bug drop here and there would be fine, maybe alongside some passive-ish events.
Really, Sep' factions just need some more depth to them to make them enjoyable to people. Sure, the newer players pry don't care about the story, lore, etc and just want to shoot the shit, but only catering to that audience breaks up the older players who might like the story behind the sep faction, their motive, moral choices, etc. They need to be believable.