I'm the developer of the Naviator application. It's not entirely true that I'm not interested in improving the EU charts. I'm currently working on some improvements to the map that I hope will make it much more useful for VFR flying in Europe as well as the rest of the world (the 3-colour base map will be a thing of the past).
If anyone knows a good data source for European airspace boundaries, I'd love to hear about it.
Cheers,
Mike