I don't know about German dubs, but they're have been some (rather cringe worthy) English dubs that use honorifics. I know a few ADV have used them sporadically. The worst example I can think of at the moment is Optimum's Slam Dunk dub.
Did we ever find out if any if the original cast is coming back?
The cover art looks really nice and I always love that artwork of Sailor Uranus and Neptune embracing each other like that. I especially love the extra focus on Sailor Saturn in the middle of the front cover.