well I like what you've did, but I do no get the "OMG ARTEMIS!" feeling. I mean, I get the "OMG", but uhm, I lost the Artemis. I don't see it's original flow, which kinda made it beautiful. While I do agree that you don't have to follow the low-poly model directions to the letter, I think you went a bit too much here.
Also, I like most of the detail, but I think you should try some reworks on the cockpit, backfins and underfins.
With that said, I really hope you'll finish this one, the Artemis is a superb bomber and it deserves a high-poly!
Lots of luck!