Hi Mayte,
That sounds fine, as I said the app platform and development should be driven by what we are trying to achieve rather than the technology. When looking at the submission we will look at what you have said, how you have planned and your willingness to adapt to changes as they appear. Its clear that you are prepared to do that. Since we have no control over the App Store acceptance process, we may find that we need to adapt if we want to get the any iOS app distributed. Android is less of a concern, but all of that is part of an unknown future. Your application, as it stands is fine and the fact that its been written thinking about a pure native app is not a problem.
HTH
Ian