The main problem I have with this episode is it almost seems like the writers are bored with Worf and want to stir up some drama with him. It's not very surprising, or genuine-feeling. It doesn't even really bring something new to Worf's character, either. We dealt with Worf's dad already in Sins of the Father. What could this episode possibly do? I really just wasn't into the premise.
Data's subplot was nice, but doesn't become a factor again in Part 2, which makes me wonder why it's part of a 2 part episode. The dream was pretty cool, though, and I always like seeing Brent Spiner play as a different character. "You are the bird." :)