They both seem fairly obvious, yet still enjoyable. The one thing a GoT based show has going for it though, is they have historically not been afraid to kill off major characters. That willingness to kill characters keeps the audience a bit on their toes.

Now that you mention it, I have to admit obviousness is not the distinction between Succession and Dragon. I guess the dragon characters just seem dull to me, and I don't really care about what they are up to.