Here's an interesting example of where time to market really matters. I've had Memoir since upgrading to iOS7, and I'm pretty happy with it. So it feels like you're late to the party by several months. Bit of a bummer since it sounds like you put a lot of effort in.
Conversely, when Memoir came out, they couldn't handle their anticipated scale, but they got their foot in the door. Seems to be a good case for "just shipping it".