Your not alone. I only got to the same spot. Does the 'Watch TV' button work for you?device is recognized, the muxes build and channels are successfully scanned and tuned. But try and get it to stream to a media playing device (browser, vlc, etc). I have been at it for hours and no joy yet.
Basically I have it tuning and EPG working. That's it. I tried my Fusion HDTV7 again with the same results.
I reverted to Debian to see how tvheadend is supposed to work and I can say that I had to build from source there because of problems.
I am thinking of trying VDR instead on FreeBSD.