I am no 'pro' but the synopsis compared to the credit block seem out of ratio. Using only 2 movie stills also and large at that again makes the synopsis seem too small, (my thoughts only).
Most pps dont like them but if you have a 'void' why not use the dreaded box to get your dvd info etc... to fill some space.
The back also needs a tag line accross the top... if you were not already considering this.
The movie stills at the moment look out of ratio to the the rest of the cover and the spine needs some attention too. Why not use the top left image on the spine and use a different image on the back? Sorry i couldnt be more precise and constructive, will look for some images if you would like,