Something I think they've really got wrong with the cover is the fact that it's only available in real leather. Although I'm not one of them, there's a whole bunch of people out there who object to that and won't touch the Oasis with a bargepole because of it. But of course a pleather cover probably wouldn't quite fit in with the 'premium' marketing thing...
They really should be selling the Oasis and covers separately (with a wider choice of covers too both in terms of materials and colours).
In fact if they really wanted to go with the whole premium thing, you should be able to pick a custom colour for your cover