I think alot of the german covers are really nice. Though they do use the same covers for some of the books. I wonder why they decide to change them if they do?
Well, they have stated that they mostly change the cover when they don't like the original version.
Cross Cult developed out of a company who did (and still does) the lettering, coloring and layout for bigger comic publishers here in Germany even before they started to publish first comics and now novels themselves, so I guess they're a tad more interested in the covers than traditional book publishers like Heyne, who held the rights for German Star TRek books in the past and IIRC never did new covers.