Apparently the number one problem with the show was that there wasn’t enough fan-service in the opening and end credits.
They fixed that.
[Update: speaking of fan-service, Nova, Lore, Elza, and Lam are not in the novels. Lore is anime-original, and the other three were added in the manga. Actually, it looks like there are two different manga running, one a straight adaptation of the novels, and the other with extra service. Airi’s bunny-suit is straight from the books, though, and “somehow” Fino and Sara both end up in them as well.]