Every show that comes after certain similar one can be seen as rip-off. But I tend to look how other shows do with that ''borrowed'' things much more then concerning myself if it's stolen from something or not. So far the art and animation of Hyakka Ryouran is superior to other similar ''fighting anime with ladies'' to me. Well, from what I've seen so far anyway...
In any case, I've checked the first episode and it looks good. It felt like watching cel-shaded anime game on some parts. I'm guessing the ink blots will be gone on some places in DVD version, so I see no worries for those that want to see nudity.
Oh yeah, this part was especially..... exciting for me.