All of this, and you can add a lot more (Mary being used as an excuse for Our Heroes behaving badly by the narrative - Sherlock only goes back on drugs because she told him to to "save" John, John beats up Sherlock brutally because he mourns for her -, and then in the end to validate them (closing DVD Narration about how they're the hope of the hopeless when we never actually saw them doing this in this season, and rarely in any other), etc., etc. As I said, I didn't intend a full review.

Basically: a mess.