It's a bit odd since, given our (admittedly limited) bit of testing before release, we found ourselves getting better FPS on Enkeladus than ever before, Borealis particles and all. Even Vlaad, who had notorious issues with the map and loathed playing on it beforehand, found its performance to be above average... That was a large reason why I ended up pushing for its release in the first place. I guess I'll just have to chalk this up to performance inconsistency.
And yes, like Twinks said, this map has had a... Long history, largely filled with frustrations over performance issues primarily tied to the Aurora.
Hmm, is there a console setting that would either degrade the quality of, or remove, the borealis effect? In its current state I'm probably better off just exiting the game for an hour instead of just getting completely fed up and angry about how terrible the map's performance is.
Don't know off the top of my head, but I'm sure there's a way you could just turn off particles altogether... 'Course, at the cost of being able to see all sorts of weapon & general effects as well
Sadly, there's nothing like a way to turn off specific effects.