Muuuch better.
I'm not sure I like how the primary gun banks point out like that, but I don't hate them.
The main weapon/engine pods need to be a bit rounder and less rectangular from the top-down perspective. This'll help with the fuselage being too wide as it is.
Engine ports for the pods had a V indentation when viewed from the side on retail. Your model loses this. I feel that the indentation is part of the Artemis's feel, since it looks sort of like the overhang/engine shroud you see in the myrmidon. These things have more to do with the fact that the Artemis is a next-gen GTVA bomber, and should have more of a curvy feel to it seen in the myrmidon, deimos, etc. Your approach is too square (might just be because the thing's an early draft, in which case I speak too soon), and looks too old Terran to me.
You're right about the gimpy tail fins, so I'll let you fix them before I comment on them.
Are you considering a two-seater or single seater setup for the cockpit? I personally think 2seater makes more sense for such a long canopy.
But yeah, to reiterate, much much better. Look forward to see how it'll look!