There's no way anyone at Zavvi approves (or approves of) this art.
They obviously want the big Disney exclusives like Star Wars, the Marvel movies and the Disney Classics range as that's where they make their money, but the downside is they also get all the other Disney releases that have a happy knack of looking awful, and taking forever to sell out (assuming they ever do).
Think about it, if you worked for Zavvi, would you really be happy with the covers for this, Hitchikers Guide, The Muppets and so on? Of course you wouldn't, and I don't think anyone at Zavvi is happy with them either. Especially when you end up with 1000's of comments on forums like this berating them for the artwork (which they have no control over). Yes, they're Zavvi exclusives but that's it. When I worked for Blockbuster, we used to have Blockbuster exclusives (mainly Disney ones) and we hated the designs (they had 'rental copy' in thick black lettering on the spine making them near impossible to sell off as ex-rentals), but Disney didn't care. Their attitude was take them or leave them. Unfortunately, leaving them meant you got no Disney films at all, ever.
I imagine Zavvi are in the same boat.