Hi,
i am not sure about the amount of work required to make it embed-able into an app, but i am pretty sure this won't make any difference for the App Store, you'll get rejected anyways.
Basically your app can't use any custom kexts, it can't request root privileges (required for OSXFUSE), it should be sandboxed, etc.
We would also love to distribute our app through App Store, but unfortunately this won't happen and i don't think Apple plans to change this anytime.
But this feature is good for other purposes, like controlling the OSXFUSE version your app uses, so that there are less chances of issues when other apps that use FUSE are installed.
Best regards,
Adrian.