Hi there
Thanks for the kind words regarding the mobile app. We also really want to add support for custom aspects and properties (as well as workflows) but right now need to wait for the right APIs to become available on the platform. We could display a big list of all the properties available on a particular file, but they would have little context and we wouldn't know which ones to hide, etc. as often all this extra metadata is held within an extension to the config file in Share, which the mobile apps have no access to (they talk directly to the repository).
Once we have agreement from the other teams on a suitable way to move that information to a place that's available via REST API then we'll be sure to bring it to both mobile platforms as soon as possible.
Thanks,
Mike