Instead of a fade to black try fading it with the border...such as with the stinger. See how that looks.
I think it looks pretty sexy, actually, I really like those shades of red and green on the court cards. The back is fine I suppose, not my favorite, but decent, although I agree that a border would look better. Lastly (and I'll admit this is hard to do), it'd be really cool if you could design your own court cards. So often we see custom decks with the bicycle court cards on a different color scheme, which is what it seems like you've done. But custom court cards-- ex, Sentinels-- really make a deck unique and special, if you can design them according to the theme of the deck. Just some thoughts is all.