The App Store isn't the sole place you should be marketing your app. If you have ever counted on just releasing your app into the store and have it somehow gain traction with no other effort, you've always been doomed to failure.
The App Store should be treated like a supermarket, after a fashion. You may get your product on the shelf, but simply relying on people walking by and seeing it is a terrible way to get people to try it. It always takes outside marketing to get people to look for your product or learn about it.
So you already have put a lot of work into making your application. Now go do some more legwork and get people talking about it.