It seems strange to not see Maul and Palpatine on the front cover - though I do like the look of having just 4 or 5 characters on the front.
If you need more space on the back cover for more drawings, the texts 'In a stream of seemingly endless never ending...' all the way to the end of 'enahnce the feel of the overall story' could be removed without info on the film being lost.
Perhaps the gold lettering could be changed to silver on the spine so that the drawings fit in better wit the rest fo the cover?
I'd wait for other ppl's opinions and suggestions before thinking of changing anything though.