Doesn't that apply to every series doujin? A few good ones amidst dozens of not so good ones. Most people who read doujin want them to be extreme so soft core isn't something doujins tend to do, unless they're non-h. But I wouldn't say Nanoha has any less soft core than any other anime...And since Nanoha has so many, they still have quite a few good ones even if a lot of them are unpleasant.
You'll be glad to know that my slow watching of Kaiji S2 has finally made me more positive about it. Once there's more Ichijou and it hits The Bog arc, things were much better for me.