I generally have similar feelings (in reference to your tumblr post). I liked this film a lot, but it (and its credits) didn't floor me the way the first movie did. Maybe it's because I have a lot of love for the arcade setting and lore, and not the internet. Still a great film though.
I only have two real gripes: the first is the sore absence of Felix and Tamora. I know something had to be cut since the crew had so many storyboards, but damn that was a massive letdown. Those two are returning main characters, second only to Ralph and Vanellope, and yet they have less screentime than the cameos. You can tell they were supposed to have a whole arc (and they show up in the Main Characters sections at the beginning of the credits, both "animated" and text-scrolling) but man, what ended up happening to their storyline was sad. I hope we get the deleted scenes on home release, or (if pigs fly) a Director's Cut edition.
Second complaint is: I really wish the princesses didn't get the glory scene with saving Ralph. It just felt cheap and unnecessarily show-offy to have cameos do that, since it's not their movie, and they already get to be heroes and have plenty of exposure in their own material (I mean, imagine if Sonic and Bowser just showed up out of nowhere and saved Ralph from the volcano instead of Vanellope). It would've been great if Shank and her crew saved him, since he didn't like her much, and it would bring their interactions full-circle to a point of mutual respect.
Other than that, I think this was a pretty damn good movie, all things considered. Ralph and Vanellope's wonderful friendship is on full display, and I fell apart when she said she loved him. The reprisal of Ralph's Theme in important scenes really drove the emotions home. The few scenes Felix and Tamora did get were very sweet, and everything involving Zangief was hilarious.
(I didn't mean to come off so negatively, you just covered most of the positive things in your post so I didn't want to repeat everything :P)