Still haven't seen Good Dinosaur (that'll happen this winter break) but I wouldn't put it over Inside Out, personally. The Red Baron stuff went on a little too long - but whaddya gonna do. It's Snoopy. You kinda have to, I guess. But man, did Blue Sky absolutely nail the aesthetics of those old specials/movies, while adding their own style to the mix. It never once felt like anyone involved had missed the point or misunderstood why Charlie Brown works.
It didn't do all that well at the box-office, but I absolutely see it becoming one of those sleeper classics where, in like, 3 or 4 years, everyone's got a copy, and everyone busts it out for Christmas, and we all wonder why we skipped out on it in theaters when we had the chance.