Reason why I like it:
*Combines the mood of all of her previous albums...
*Headpiece = armor on, gold lips = goldenheart, blackface = blackheart
*She has red "third eye" which represents awareness or completion (this album completes the trilogy).
*And I think overall it symbolizes the "complete" person...you go through trial and tribulations, you fall, you get back up victorious (hence the jewels all around her headpiece).
And I just think it looks cool in general.

I'm sure she has an explanation for the blue background.