I love the Synclavier stuff too. This album is definitely a mixed bag, and not one I listen to often, but I like it more than LSO. The orchestral stuff is more accessible IMO than the preceding LSO album. The title track is one of Zappa's great orchestral pieces, yet one of the most unpopular tunes in the Zappa canon. Lots of different moods covered.
The Synclavier side of Zappa would only get better from here on out, but these first experiments with the machine are pretty cool. Zappa's music is becoming increasingly more complex at this point, and the Synclavier helped to speed that process up.