If you really want uniformity, you can always buy multi-disc cases and print your own covers. Not the best solution, but it means that you can get exactly what you want. As for me, I know that any disc I own, no matter how often I watch it, is going to spend more time on my shelf than in my...
Not a fan of the box, but that's marketing for you. Once they're all released, it'll be easy enough to make new cover art and replace the cases with multi-disc ones (like I'm using for Star Trek).