Yeah that's one thing that can be annoying. I have an app that does something very similar to at least 15 other apps on the store (that I personally use and think is better than many of the others) that I can't get approved. It was ok 15 other times, but clearly it shouldn't be allowed on the store.

Now my job isn't to fix bugs or add improvements I'd like (as I've already made it do everything I want in my personal use case) but to figure out what I can possibly add to make it acceptable to Apple.