Armor will be in pieces, as in the current armor in rouge trader are chest pieces, I believe there will be six pieces. I believe they are still deciding on how you achieve armor unlocks, but it should be at least partially tied to PvE(for certain pieces at least) On a related note, some people don't want to suffer a headshot damage penalty if they don't wear a helmet. I believe they are rightfully shit out of luck on that one.
This is our thread thank you very much and you can kindly leave or i can shoot you with my astrates inferious pistol