My post wasn't really attempting to be very scientific

just highlighting how useless threat level is to gauge actual threat (which basically runs high unless you're prepared).
The option is sometimes to just avoid them or run I suppose. Less so at irregular markers. Threat 2 at these demands you be prepared for some adept anti swarm strategies. Often requiring you be capable of evading 6 scavengers at once whilst being able to kill them quickly enough before the 2nd boat load of 6 get dropped to swarm you.
It'd be better if the 2 boatloads were opposing factions (so some might not attack you or at least will also attack each other). Still, this sort of event needs to be reserved for the higher threat levels.
If fdev really think their threat levels are correct then I think they greatly underestimate their AI's ability to put the player under escalating pressure.