It's one of the two stories in A Clash of Kings that is clearly suffering from Martin's desire to expand the length of the novel series. The other one is Arya's.
I think Arya has the best
chapters in that book, loved all of them. Only Dany's chapters felt kinda unnecessary but she only had a few so it didn't bother me much.
Arya's Clash chapters are great. The show did not translate them very well though.