Thanks for the feedback so far!
Juslen - you're right, the scroll was bunk. I scrapped it.
FMD - Please explain where you see a kerning problem?
Ruby Blue - Design 3 is supposed to be simple, not patterns, very little decoration.
I don't know what exactly you're referring to by "design 3".. when I last visited there were only 2 designs and in the second one (with blue as dominant color) the author's name was overlaying on a repetitive motif of circular shapes, which I think is what could be considered a pattern (sorry if I sound awkward, english is not my first language).. I see they've all changed now!
The new variants present good improvements! Not only do the main areas of the book (title, author) are more evident and have recieved the importance they deserve, but also subtle details, like the delicate handwriting behind the central image (last cover) make the design feel more complete. Right now, I best like design 5 (with the pillar more discretely present, as in Dongers suggestion) and 6.
Not sure whom Dongerz's subtle attack was made for but feel the need to point out that:
a) When I made my first comment, all the covers looked different than they do now.
b) Ironically, I noted the same things regarding the hierarchy of elements (with the main info of the book needing to "pop" out more and the multitude of details detracting from it) but not as directly, because language restricts me a bit.
c) I don't think you need to present an astounding body of work to have a valid opinion. In fact, many art critics won't be able and don't have to do that.
Not my intention to distract from the main discussion here, but I've found that comment to be a bit disrespectful towards the first posters, though masked as neutral attitude. Be the advice good or wrong, I think we can all evolve by discussing and providing arguements and not just suggesting some are less "polished" than others.
Not that it matters much, but I've been immersed in this field for more than 5 years now, currently studying for a master's degree in Advertising & Book Graphics, so I've done a few book covers myself under the guidance of an experienced teacher/book illustrator. Still, I also think even a novice can have valuable oppinion in the matter..