Sorry for the double post, but the covers for ONENESS has just come out! (And almost the same day as Ayu's A ONE!)
Limited Edition (CD/DVD)

Regular Edition (CD only; iTunes cover?)

Cover's dress in detail

Source: BARKS (http://www.barks.jp/news/?id=1000113657)
In my opinion, the cover is...well...not so epic. There is an obvious negative - so obvious that I am really changing my mind to actually not buying it - the text just doesn't seem to fit pretty well.

Not a fan of them, main concern is the light on light text. Most obvious on the CD-only cover - YELLOW on WHITE! WHAT!? Yeah, not liking it. miwa herself is epic success...but the text - that's an epic fail for me.
I just don't understand why the graphic designers put the text in such a way that doesn't impress us. Even the CD+DVD cover looks like wordart to me (remember wordart in Microsoft Word?). It's too 'cheap' to say for such a major album release.