Ehh, the food is excellent at Cathay, but I think it depends how much you like the Frozen Musical. I saw it once shortly after it opened and don't plan on seeing it again.
$89 is a little steep in my opinion, I would spend that much for World of Color dining package however. Mainly because I think WoC is a superior show and worth the better seating. The Hyperion Theater has excellent views so matter where you are in the theater so a normal fastpass is fine for me.
Also keep in mind, you can't use an annual pass discount for the Frozen package for some reason. You can use annual pass for WoC dining package but not Frozen.. So weird.