So the newest vet rewards are the new ship material and a gold version of the decorated Jupiter uniforms.
You know, I can just picture the project manager telling the graphics designer, "Come up with three different hull materials for season 6 fleet ships and I'll pick the one."
The graphics designer returns after a day or two with the three new hull materials and the project manager goes, "This greyish-blue hull looks cool, lets use that for fleet ships. But wait, this silvery one isn't bad either. I know, lets use that as the 900-day vet reward."