I'm sure you're not alone. Beorn's introduction is important as he comes into play in film three.
(I figured that he had to come back into play.... Otherwise it was the most pointless character ever.) The spider sequence is important as it shows that Bilbo isn't the same Hobbit that left the Shire
(But we saw that at in the first film at the end when he save Thorin So it really does not add much... I argue that it was more important to see that the Ring was having an effect (of course even though it is not supposed to effect Hobbits as much and he had that thing for 60 years so He is one Lucky Hobbit ) and we get the see the naming of Sting
(Fair Enough but wouldn't really count that as something happening.. Plot wise). Both these happen in the book. They get captured by elves in the book the movie way is a little better. The stuff in Thranduil's halls is fantastic. You get the great argument between Thorin and Thranduil. The hate that exists between the two and the greed of both is really well done.
( I don't know if I would call it a "Great" argument and again it was something that I already understood very well from the first film But I will give you that it was at least one small moment in a very long sequence) It also gives us a great character moment between Tauriel and Kili
(your definition of great is much different then mine. I like her character very much but I did not care for the Romantic link at all). Despite the hate between the leaders two can try to understand each other. We also get to see Bilbo show off his burglar skills and prove his worth to Thorin/company.
(Again this was already established in the first film... Hell he was even a better Burglar because he did not hhave the help of the ring) The barrel sequence has a couple issues but is a little more exciting for most folks than the book sequence
Lake Town introduces us to Bard and what he's all about. He's kind of important to the story. You also get to see the corrupt nature of The Master and how bad Lake Town is. This plays into things in the future. I love most of the stuff in Erebor. Bilbo v Smaug was great. I would have taken some of the action out and put other stuff in earlier in the movie.
(this Basically takes place in the later part of the film which I have no issues with for the most part.)
There are some nice character moments. Kili/Tauriel,
(for you not me, I also don't like that it takes away from Elrond saving Frodo in LOTR... Apparently any Elf can do it) Balin/Bilbo, Bilbo/Balin,
(can't remember these off the top of my head but I do know that did not feel like Balin and Bilbo were in the movie enough) Bilbo/Smaug.
(end of the film and yes that was good) It had more than the book does really at this point. As far as the panoramic shots the areas we visit don't lead to much of that to be honest. I don't think you will find any place in NZ that looks like Mirkwood, Thranduil's halls, Lake Town, and inside of Erebor All of these places had to be done the way they were done.
(True but that did not stop them with Interiors of the Wood elves, Rohan, Mines of Moria, Rivendell etc.. Middle Earth just felt more alive and real.)
I thought there was plenty of dialogue.
For me The Main Characters did not get enough