“The Hobbit: Battle of the Five Armies” feels less like a movie and more like the third act of a movie, being almost entirely based around a single awesome battle. You might find it to be shallow...because it is...but it's certainly not 'slow'.
"The Hobbit: The Desolation of Smaug" is about as 'good' as part 1, but before detractors start groaning in disgust and giving up on the flick, I actually think you might like it. Of the entire "Lord of the Rings" franchise, this easily has the fastest pace, never letting the viewer catch their breath for about 3 hours.
I actually like “The Hobbit” more than the latter two sequels because it is a return to what I liked about the original. Yet I also can't deny that it is the most flawed of the Peter Jackson-Lord of the Rings adaptations.