Having now seen BotFA, it's time to render a verdict on the Hobbit Trilogy, and compare it to the Star Wars Prequel Trilogy.
First of all, Battle of the Five Armies is the most tonally uneven of all the Hobbit films, with poignant character moments jarringly interspersed with mind-numbing CGI battle scenes. The oddest part is that I had a better understanding of the battle while reading the book than by watching the confused movements of CGI armies on the big screen.
Moments which were cinematic in the book, such as the return of Bard from the ruins of Laketown or the heroic battle of Thorin and his company agains the orcs, are completely different and strangely muted in the film. On the other hand, the character of Thorin is actually more heroic in the film than in the book in my opinion.
The primary decision of Bilbo, which I believe is the most important character moment in the book, is done justice. Barely. However, just as much or more time is given to characters entirely absent from the book and who add nothing to the story. Characters such as Tauriel and Legolas ultimately serve no purpose in the story, and the character of Legolas is entirely confused in an attempt to link him to a character in The Lord of the Rings.
In summary, I was relieved to see that the central story which focuses on the titular Hobbit remains strong throughout all three films. Unfortunately, the final chapter shows just how superfluous all of Jackson's additions really are to the story, and how pleasant the story will be when someone edits the films down to a single movie about Bilbo.
So is the Hobbit trilogy suffering from the same problems as the prequels? Not remotely. There is a compelling story hidden within the Hobbit films, something entirely absent from the prequels in any form.