I can't speak for more recent content, but I have enjoyed finishing up old bits of missions I never completed and/or doing group instances. For $20, you can get both expansions and another 10 levels of content, and I think there's one or two $5 DLCs adventures.
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The Master said: "It is all in vain! I have never yet seen a man who can perceive his own faults and bring the charge home against himself."
>Analects: Book V, Chaper XXVI
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The Master said: "It is all in vain! I have never yet seen a man who can perceive his own faults and bring the charge home against himself."
>Analects: Book V, Chaper XXVI